343 is obviously capable of making Halo 6 great. People hate on the new art style, I personally like it, but 343 is more than capable of making the older art styles with modern fidelity: i.e. Halo CEA, Halo 2A and Halo Wars 2. Forge is better than ever in 5, switching from stupid World Units to feet as the measurement, so really other than perhaps some more logic chain options there's not much to improve. The campaign in 5 was mediocre at best. In 4, the story was pretty incredible but a plot hole appears in the first 30 seconds of gameplay, in the form of the intro scene with the Spartans having the same armour that John wears during 4. The explanation for John receiving this new armour was because of nano bots upgrading his armour, but as for the other Spartans, this is canonically incorrect because the cutscene takes place before Halo CE. The explanation I could find for this was simply that 343 ran out of time to use the correct armour set because the 3 year cycle of Halo releases was broken after Reach. Another thing about this cutscene is that John receives Cortana from Dr. Halsey, but we know that Captain Keys gave John Cortana, and that Halsey was never on the Pillar of Autumn. The gameplay in 4 suffered the same way it did in 5, with the latter landing itself in a weird plot hole for its story. This is the major point for me that must be improved. The formula for multiplayer in 5 has two modes: Arena and Warzone, which appeal to Halo 3's and 4's audiences respectively. The problem is how the Req system is implemented. Armour is no longer tied to challenges, and it is the way it was in 3, with only the colours, visor, helmet and armour customizable. This is an easy fix, as all that is needed to do is split the armour sets up like they did in 4. As for the challenge based unlocks, once again could be modelled after 4; perhaps removing armour entirely from the Reqs would be the way to go. As for vehicles and all else, I'm not really sure what could be done here if the theme of Reqs and Warzone will still be present in 6. As for abilities, I actually like all of them, and base movement speed is actually the fastest in Halo 5 than any other Halo. Sprint is a debatable topic; this is the one "ability" that many disagree with and I understand why. Due to the large nature of the maps combined with the high base movement speed, this creates the illusion of speed; in Arena, it's a different story. These are all just my two cents, but also some suggestions for Halo 6. TL;DR: I want 343 to be successful in developing the next Halo because they have the potential to do so in their actions with H2A and HW2 but fell short with Halo 4 and 5.