Why no Feather Falling? Does this reduce Acro XP?
After reading the wiki it sais -
"Currently, a fall with feather fall/protection armor equipped will net the same XP as if you didn't have the armor on, but without suffering the full damage. Because of this, you will also earn no XP for a fall that would have killed you if you didn't have this armor equipped. "
So since you would actually die from this you shouldn't have those fancy shiny shoes.
Mmmwait. Then that means it's only bad if the featherboots saved you from dying (more than 22 blocks high). Even if you survived, you get no XP.
But, say for an 11-block-high fall, it'll give you the same XP but without the damage. To quote the wiki again, this should "net the same XP as if you didn't have the armor on, but without suffering the full damage," making feather boots actually beneficial.
So for a 22-block fall, because it didn't cause you to die, you still get XP, and end up with more than half a heart, allowing you to recover more quickly.