Not read through the comments, but I suspect a few are rather negative and off the mark.
Early/12.30 kick offs are notorious for poor atmospheres at any PL ground, not just at the Etihad.
The match was hardly end to end. Chelsea were defending for most of the match. With the game being played out mostly in midfield.
It was a tense match. 1 goal either way was always going to win it. There were only a couple of clear cut chances.(for both sides)
The 1st half wasn't great, I'll admit that. The 2nd half was much better.
After Kev scored the Etihad was rocking. Especially towards the inflatable CL trophy waving Chelsea fans.
Towards the end of the game the nerves kicked in again.
Not a patch on the Leeds atmosphere. But not the worst atmosphere either. Just wait until Brentford for that. ;-)