I understand that this has been said and DB and HoW probably were in Vanilla, of course they were probably changed and the missions were changed a little, but my main goal is to make it all fit, make it a full game, cause even with the Vanilla and DB/HoW, it's not a full game. Let's make this a full game now
So, when you load in Destiny you start with the same mission you start off with at the beginning. That mission was one of the best missions and way they could introduce the game and story. I would then want the story to be completely changed from there.
Upon entering the tower, I would of wanted the tower to be bigger and better, have more things to do of course. I'd want to interact with NPC's, obtain bounties with them, talk to them, the simple stuff of course. There needs to be more purpose here than what there is now
I would also want each story/DLC broken up into Saga's and upon completing one saga, you would be able to access another Saga. After completing the Heart Saga (I'll call it that for now), you won't be able to move on until completing this raid called the VoG (I'd want a story behind VoG and a some missions leading to it first, maybe call it the Vault Saga?). There should be matchmaking that automatically puts you in game chat so everyone can talk OR have an in game LFG, that way it would make completing the story easier to do. This VoG would be an easy walk through at a lower level so players can easily complete it once. Upon completing it, you would obtain a vex looking legendary that can later be ascended to the best level. You would not obtain any gear besides the gun at the end and any rewards for completing the Saga, you could then do VoG again after completing all the saga's and opening the end game.
DB and HoW are simple, change all the missions around, add cutscenes, have them each in their own Saga, and the game would make since, have the game explain Crota, also maybe see some holograms of Crota to make him more of a threat, maybe Crota himself could appear once and a while and attack you/warn you. This story should finish off as a raid, a completely remastered raid at a low level for people to complete this raid at, again you will obtain a legendary item at the end that is ascendable at a later level
For HoW, it's the same thing, they did a better job with this DLC than DB. Remaster some the missions and add in new ones to make the Saga bigger, make Taniks a threat and show him off during the story also make some missions geared to him, Aksor, and Skolas to make them more of a threat. This should end with defeating Skolas as the story mission and then going into the prison as a strike. Skolas is trying to escape and has opened up the armory for all enemies, put an end to him and make sure he doesn't escape. This would make the reason for killing him in the prison better along with every other enemy in the prison because they all have guns and plan to escape. Upon completing this you will obtain the Vestian Dynasty. The Remastered PoE with new bosses and enemies and things to do will be available after completing the story, same with the remastered Skolas level 35 PoE will be available after the story as a Non-Canon activity (You actually kill him as a Strike, but the end game activity will have Skolas there for rewards). The Skolas strike will also be in the strike playlist.
After completing that Saga (If TTK would not be in Vanilla), the end game would open up and the strike playlist will be active with different levels/modifiers. All raids will be opened up at a higher level for end game rewards. Upon completing all the saga's on one character, all other characters will have it open along with all cutscenes will be skippable after watching it for the first time. All strikes will have their own side missions explaining why we must kill them and why they are a threat. Upon completing the final Saga, you will get a random primary exotic weapon coming at max level. The Tower and Reef will also have more places open and they will have more things to do. Etheric Light can be obtained to raise all the damage and Defense up to higher values, but they can only be obtained in Raids, Nightfalls, Iron Banner, ToO, Weekly Crucible Bounties, and PoE's. (Screw infusion) There will be no cap of legendary marks and the max you can hold on all characters is 500. Many Year 1 Exotics have quests tied to them now. All year 1 Exotic Bounties are now quests you will obtain, NPC's will also be in the open world such as the moon and mars to hand out quests, or even fight. (Did anyone ever want to fight Cayde-6 for fun?)
As for leveling, all levels will be locked off per Saga, VoG Saga could be locked out at 30 and the raid for it could be 28. DB could lock off at 40 with the raid being 38. HoW could be locked at 50 with the strike being 48. After this the end game max level will be Level 55 and it will take a lot of XP to finally reach that level.
Normal Mode raids would be level 52 and would give out certain (Secondaries, Chest Pieces, etc.) weapons/gear out at max damage/defense along with one etheric light. Hard Mode would be Level 55 and would give out any (Primaries/Helmets) weapons/gear at max damage/defense along with one etheric light.
PoE would have Standard 50 with easy bosses and less modifiers, Level 52/54/55 all with random bosses with random encounters and random modifiers to make every PoE different from the last! No more Armor Core/Weapon Core, you just obtain some armor and weapon from completing rounds or completing the PoE.
Strike Playlist will be 50/52/54. All Strikes will have random encounters and all will have strike specific gear!
No more light Level, or infusion, any blue weapon/armor can be ascended to max level, but it won't be as strong as other armor or weapons. Omolon, Suros, and Hakke will all be in the base game as well. Level 55 will be the hardest level to hit, taking a lot of XP to finally hit it. Once DLC comes a long, new max will be raised by 10 and all end game content will be raised by 10 but will stay at the current level for people without DLC (TTK Saga will be locked at 60 and super easy mode of raid will be at 58. The end game max would then be 65 with) This will make sure no one is left behind and all content will be useable!
TL;DR
Vanilla/DB/HoW get fused together to make Saga's with very in depth missions and strikes that will give reason to keep playing and defeat that enemy. No light level and max level will be 55 and each DLC will add 10 levels.
If this is what Vanilla was, we would be seeing an amazing game! Please give me feedback and like this/post this around! I hope you guys liked my ideas :)