2 semis on hardcourts for nadal is a good result. Considering that he was actually pretty close of winning those two semis, I expect him to dominate the clay, his favourite playing surface. Nadal is just a beast on clay.
I agree, if he wants confidence it won't matter if he gets it here, because who's going to beat him on clay? Lots of confidence to be had there (and success on clay will give confidence for Wimbledon). Thing he got out of these hardcourt events was tactically he got his aggressive game going.