AS offers a lot of mobility but much of it requires using a specific item to leverage it. Personally, I feel like just speed isn't enough to make me want to have a mobility based perk set as it doesnt really synergize with things like vicio mantle + Traversal wand. I feel like jump height perks would not only make moving around feel much better on a base level, it would work well with existing movement options and make perks near vicio more enticing.

At first, I thought jump height could just be intrinsic to movement speed, but now I like the thought of someone maxing out their perks for the sole purpose of jumping 10 blocks as a meme (maybe not that much.) perhaps the swim speed perk branch from 1.12 could be brought back but with jump height since I think people care more about jump height. maybe both could be brought back as perk branches nearby vicio. it could also be added on to the effects of vicio engraved glass to separate it from vorux more.

Maybe there could even be midair jump attribute so you could use starlight charge to double/triple jump. In general, I think the reason people don't say much about run speed perks, even though you can get FAST, is that the most fun forms of movement in AS, and in general, are ones that work in three dimensions.