I'm not saying that it doesn't play great or looks bad because it doesn't. What all the rumours are are pointing to is that the whole thing is held together with zip ties and it is a long and laborious process to do anything.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.
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.