If you’re planning to put this stuff in, don’t, or at least, classic playlist with every game mode variant, please, with old school map
Doing a quick scan of the “THE RETURN OF CLASSIC MOVEMENT MECHANICS?” thread, I don’t envy 343 as they attempt to navigate this debate.
As an older player, my skills are likely better suited towards the classic mechanics. I’m not quick enough to keep up with all of the young guns. That said, aside from Spartan Charge, I’m not drastically opposed to the newer mechanics. I’m learning to accept the personal limitations of my aging reactions. 
If I had to guess though, it seems like 343 has been evolving Halo 5 - tweaking matching and mechanics as data and feedback gives them guidance. As such, I’d be surprised if they made a significant course change with Infinite. Instead, I suspect they’ll keep building on the Halo 5 foundation, and we’re likely to see minor adjustments…the way HCS now plays without Spartan Charge and Ground Pound.
So maybe a little bit of both elements in the old vs new debate. (Which I’d be fine with). That’s just my guess though…for what little that’s worth.
We have a long running sprint topic in the Halo 5 forums and the topic noted above. Going to close this off in favor of them