I would LOVE weapon crafting. Like modifying stats, using weapon parts and getting different components. Like say I want a scout rifle. You can choose a firing chamber for either faster firing and less impact or slower firing with more impact, then the frame for your stability, range, reload speed, and handling, then the barrel for range and stability, and the scope for the stats they normally control, like stability range and handling, also you could customize the reticle shape, color, and add enemy highlighting of any color, and choose between outlining the enemy, or a full body coloring, and a magazine for either more ammo, or a faster reload, then you can choose what perks you want, then you can choose the ammunition, and choose if you want something like armor piercing, high caliber, or ceramic jacketed at the cost of one of the perks in the perk tree, or possibly add a full auto capability to the primary stats you don't have to unlock, and even change the damage type, from arc, void or solar. Then you can paint it any combination of colors you want, or not painted at all for a bare metal look, add chroma support, change the appearance and shape of the weapon, change the reticle color, etc. The gun would start off with like three attack and you would have to infuse, but it would be an exotic valued item. If bungie added a weapon crafting system like this I would play so much more. Then you could infuse the gun with other stuff to make it competitive. Also they could definitely do this with armor, so you can customize your specs as well. Maybe even add some kind of crafting system so that you can take old year one armor and use a bunch of materials to bring it up to year two values, while keeping the looks and perks. I would love to wear that old vault of glass armor and use fate bringer, vision of confluence, and praedyth's revenge once more. Even that old vanguard machine gun, the swarm, was awesome.