Overall pretty good, I do like David Tenant and Catherine Tate, I think they work quite well together.
Mostly I liked the non-binary bit, although I've seen people complaining about it. It gave them a plausible-ish excuse to bring Donna back, which is good.
The Meep being the baddy and the insectoid Wrarth being the goodies, was fairly obvious from the start. The cute fluffy creature is never going to be nice nowadays, although it's become a bit of a cliché either way around! I quite like the Wrarth, and hopefully they'll replace the Judoon, who were excessively annoying and dogmatic as an outer-space police force.
... and of course, they sort of brought back the "Round Things".