The show does have great potential. To allow it to die is so cruel, IMO. A lot of people do blame the problem on McPhee, though, it's the writing that puts her in that spot.
I have struggled trying to see Karen, the way the show wants me to see Karen. It's a problem. And they have made her character so one dimensional. It holds little interest for me. For me the number with Kennedy was so boring and as a far from hot as you can get. McPhee is just not right for that role, IMO.
I'll keep watching though. It seems such a waste of talent to let this show go down this way.