Captain Marvel started off a bit weak and had inconsistent art throughout...but has got stronger as the series started off. Avengers Assemble under Kelly Sue DeConnick has been more interesting to me than it was under Bendis.
Captain Marvel wowed me right out of the gate...but then again I am a tad biased as I was a fan of Carol's before the book even began. I found the first arc to really grab me as well. After that it kind of floundered a bit, but I stuck with it and am glad I did.
The art as you mentioned is still damned inconsistent...just when I was getting used to one style, they go and change artists!
Speaking of artists. I will be interesting to see how Captain America will look when John Jr. leaves the title after this next issue.