Is Federer Now Just Good Enough Up to the Semifinals?

Being so dominant for so long, it does feel strange to just see Roger Federer (SUI) (#3) reach only the semifinals of any tournament.  He only reached the semifinals this year in Indian Wells, the Australian Open and here in Miami - and his only title for now, is the one he won in Doha.  Will his killer instinct still be with him as he fights through the top echelons of the game?  This was his path to the semi's -

SF - lost to Rafael Nadal (ESP) (#1) 36 26
QF - Gilles Simon (FRA) (#27) 3-0 Ret.
4R - Olivier Rochus (BEL) (#89) 63 61
3R - Juan Monaco (ARG) (#35) 76(4) 64
2R - Radek Stepanek (CZE) (#68) 63 63
1R - Bye