It doesn’t add anything to the gameplay, really, at least nothing that slight increase in speed wouldn’t also accomplish.
Halo Infinite’s Sprint speed is like… 8% faster than Base. You can bump up the base speed to the Sprint speed, and the game plays perfectly. It’s the same deal with Clamber, because jump height has been nerfed since Halo Reach, and Clamber became a “necessity” to fix a created problem.
I’ve never understood the utility of Slide - with aim assist and magnetism the way it is in this game, the only thing it’s good for is getting into cover faster.
Name a map from Reach/4/5/infinite that is of comparable quality to something like guardian, sanctuary, lockout. You can’t, because they don’t exist, because of sprint.