They've used multiply writers since Eccleston, it's the director they changed. Now it suffers from the same problem most BBC stuff has - shit production.
I just can't get away with Matt's doctor at all, they've wrote the character as a mincing faggot. At least they finally made an episode this series where it's the doctor that saves the day, if you look back on the others the hero was Amy.
Tennant's been the only good doctor since the 80's, the others just aren't doing it right.
I say bring back the fairies from torcheood