I'm quite fond of most of Matt Smith's stuff, but I must admit I'm still not sold on Capaldi's Doctor (I need to watch the last series through again, though; I've been waiting for it to come down in price on Blu-ray!).
I think Moffat is one of the most inventive writers Who has ever had, but I'll concede that he doesn't always get it right. I also think that Moffat should probably be moving on before too long, because I don't believe it is healthy for any long running series to stick with the same person for too long (fresh ideas, and all that, although I wouldn't have said Moffat has run out of them just yet).