They were all controlled by the cap in the beginning, but fleet footed got changed because they noticed than no one would use it. Ever. They should ofc change the others the same way, anything else is just stupid, but we'll see what happens in future patches.
Tempest Rush with Tailwind is NOT capped, so with that one you can reach 160% constant movement speed as a monk. Then you can wave bye-bye to all sprint barbs Same goes with Dashing Strike and the movement speed rune, whatever the name of that one is, for even more speed.