Yeah Howard is not an MVP candidate but he is still having a good year. Not as good as last year but he has 45 home runs and OBP of about .400 that's not bad, especially with missing almost 20 games and being dinged up for a lot more.
I'd say Rollins is the MVP of the league, although the Phillies fan in me makes that a biased vote. He's played in every single game at shortstop and is outstanding in the field, he has over 700 at-bats (which is like top-10 all-time I think I heard somebody saying?) with about 30 home runs, 40 doubles, 20 triples, 40 stolen bases. In addition he's been the face of the team all year and a great leader.
Really though, that whole Phillies offense should be the MVP. Their pitching is god-awful, their two "big" free agent pitching signings, Garcia and Eaton, were total busts, they were using Jose Mesa and Antonio Alfonseca as closers at one pint this year but they just keep scoring runs. It looks like the Mets are cruising to the win today, so the Phillies need to come back against the Nats and stay one game up to make this thing happen.