Sorry but I hard disagree, they are entirely connected
My m.o when doing CRTs is to try to consider every consequence for an upgrade, and liking it or not, making the universe Infinite makes every feat of (completely) crossing it, well, Infinite. I say that, but I actually don't think that's the case here, I agree that most feats aren't really explicitly described as crossing all the scope of the universe, but usually something like "from a universe away" or similar, which could it be just about regular/somewhat Universal distances, since it's inside an Infinite Universe, that's completely possible. With that in mind I think it's likely that most, if not all feats won't qualify for Infinite speed (I don't remember one so specific), and the few ones that may or not appear can be seen as simple outliers when considering all the inconsistencies they create
It would be different if we had multiple statements of clear Infinite speed, since we wouldn't be able to call them Outliers like that, and eventually, I would be against Infinite Universe for creating numerous scaling problems
Also, I also dislike the idea of taking the Universe being Infinite as "Possibly", even if it's just a few quotes, most authors don't even go into details of the universe's size, they just call them "Universe", maybe someone can list quotes or scans that imply a Finite Universe ?
And for the last topic, if accepted, I think we should move the feats that became High 3-A to their "2-C at peak" ratings instead of nuking their 3-C rating, said level isn't there for lack of better feats, otherwise they would just be 2-C, but to show their casual to normal levels, which are consistent with 4-A to 3-C even without the ones with potential to become High 3-A