I think that your stuck in the mentality of Morrowind. Everyone wants acrobatics back to Morrowind so that you can jump over the empire state building when your maxed out.... As for athletics, it has definitely outlived it's usefulness also. You can have other things in the game that are tied to something else increase your run speed and jump height instead of taking up an entire skill slot. You can still alter your run speed and jump height, but now you don't have to waste skill points to do that.
Wow so you never played a stealth class thats cool.
So i liked to hop on top of building while behind pursued and shot at; and sometimes JUMP over an enemy land behind him and go KAPOW; so yes it adds fun maybe not for "im a warrior stomp stomp" be for stealth classes its win.
Athletics could control Sprint amount; Basically how fast your stamina reduces when sprinting HIGH athletics it reduces slowly. So if you have high stamina+high athletics your an Olympian sprinter.
ALSO before you go well herp the durp we can just combine those all, yeah we could also combine all the skills into three groups; stealth, combat, magic then you might as well call the game fable at that point.