I thoroughly enjoyed the last 4 episodes and especially in the last one I liked Eleven very much. For me those stand-alone episodes just work so much better than the daily-soap-drama aka story-arc. ;) Craig and the baby should sign up as companions for the next series.

I think that the finale is going to be as much of a mess as LKH because it looks as though there's just too much to pack in.

Yep, my thoughts exactly.
There will be much hullabaloo and everybody and their mother will turn up (including the kitchen sink ;) and in the end it will turn out that everything we saw this series was timey-wimey wibbly-wobbly and the Ponds get baby Melody back and live happily ever after. Just my speculation of course. ;)