TBH I didn't have much of a problem with him last night.
I thought during the first half he was exactly how I would want an English commentator to comment on an champions league game involving an english team. He was purring over Aguero, he pointed out we have some issues defensively (which is true) and he repeatedly said that our front 6 was dominating the game. It was the first time I can remember listening to him thinking 'this guy wants us to do well'.
He was not quite so complimentary in the second half but in fairness I thought we took our foot off the gas somewhat, especially after negredo made it 4. Yes there were references to Bayern, and to the rags, but playing devils advocate he has got to fill the airtime and it is not necessarily a sign of bias to say we got outplayed by Bayern.
Maybe the thing is that we have become so used to hearing him get more excited when the other side get a corner than he does when city score after a 20 pass move that we start to hear only the bad. Maybe also after the treatment Yaya got in Moscow he was particularly 'on-side' last night - it was a thought that crossed my mind when I was listening to the first half commentary.
Either way, I thought last night was a considerable improvement on other games where he has done the commentary recently.