I personally think having to have the game on the Xbox One was the biggest problem for them, in addition to having less time to create the engine than they would have needed. Halo Infinate actually nailed the Halo look and feel, which was the thing they really needed to get right after their previous efforts.Looking at what they got, I find it hard to believe that they went in big on slipspace. If they had, We probably would have ended up with a completely new from the ground up engine. This is more on the competency of 343. We will see the difference once turn 10 unveils their new motorsport running on their new engine.
I don’t know if it’s true or not, but I read that 343 considered porting everything over to UE5. Still something isn’t right, it’s obviously still taking them a geological age to do anything with what they have.
The gameplay in Halo Infinite was excellent.
The biggest issue for me with Halo was the pop in, which I thinking was because they couldn't tailor the engine to take advantage of the XSX SSD. On top of that, the game lacked that polish I wanted to see. Stuff like ground deformation when the warthog was travelling for instance. Again, I think that came down to time, and I also don't think 343i are the most talented studio from a graphical point of view. Diversity over talent comes home to roost.