No, you literally can't cap haste w/ usu feet without sacrificing +2 legs, therefore losing out on one of the only real advantages SAMs have in terms of haste. Also losing +2 legs would kind of render the STP bonus on Usu feet useless, wouldn't it?
Also assuming 5hit on Masa, which requires huge haste sacrifices in the first place. lol kikugosaku is like, automatic 5hit, but lol if you're using that and playing SAM seriously.