It's stagnating, that's for sure.

It went downhill a long time ago. It picked back up again for a bit when Clara left, but then it promptly went back to going downhill. Every time I hear Moffat attached to something now I roll my eyes. He can do good work in short bursts, but he can't handle a long running show to save his life.

It's a hell of a lot better than it has been in a long time. The series with Clara really sucked. It is a far better show now than the previous season and I can actually enjoy it again. Plus, Capaldi can finally show off how he's a good Doctor now that Clara is gone because for whatever reason the writers decided to revolve the series around her with really crappy episodes.