Season one (spoilers)
Just finished this and I thought the final battle should have taken up at least half of the episode rather than 10 minutes at the end.
I also found the Wulfhere betrayal bizzare. Unless I missed something there was no warning or suggestion this would happen. Nothing said about it before or after, he just appeared on the opposition's side as if by magic.
Two important battles earlier in the series took place completely off screen. I found some of the choices of what to show and what not to show a bit strange.