I can't speak to Infinite because I've only used it for forge. And that mode is so buggy as to be useless so I can't imagine how messed up the gameplay might actually be. And I'm certainly not trying to say that "Halo failed because it got too twitchy." Halo failed for more reasons than I care to count, but far and away the whale on the list is Microsoft mis-management. But that's for another time.
I remember not long ago seeing a YouTuber who did a side-by-side of CE gameplay and Guardians gameplay. I knew intellectually what a dramatic difference it was, but SEEING it spelled out like that was like the scales falling from my eyes. Sprint took that game where it needed to go. Ground Pound took it somewhere else. And Clamber. And thrust, slide, and charge. It just became a chaotic messy **bleep**show that required any veteran player to throw away years of muscle memory and begin with a new and completely unintuitive control scheme. Spent decades getting your aim just right? Doesn't matter because some adhd caffeine binger fresh off of Quake will Spartan charge you and 343 will reward that trash with a kill. Because kids, I guess.
But I digress. Where I'm headed with all this, as always, is not to bust on any particular change. I could easily picture reloading while I sprint, and I don't imagine it would upset the fabric of the universe in any appreciable way. Except, again, that it represents a subtle disturbance in the force. Yesterday it was opening bins while using an Ultimate Accelerant. Today it's reloading while sprinting. Tomorrow it's some insane combination of activities all happening at once so that an opponent witnessing it can't even tell what's happening much less where to shoot. And, to add insult to injury, it will be some insane combination of activities that every PC player on the planet will macro, making them even harder to compete with than they already are.
In general, things that speed up pace-of-play are bad. Things that slow pace-of-play are good. I want to be able to THINK about what I'm doing, not just REACT to what someone else is doing. You get to a certain age and a game had better test more than just my reflexes. Because those aren't what they used to be.
Oh, and you're 100% right about the way bad net code and garbage servers interact with gameplay. It's a disaster, and people should be way more wound up about it. Good call. And also, yes, the current season's gameplay is not good. Not good at all. Far too twitch, imo.