Just started watching Season 2 of Agent Carter.
So far, I find it to be significantly better than the Agents of SHIELD arc of the current season. Peggy is a well-developed character, and her associates are just as interesting, diverse, and dynamic. The story is very tight, and moves at a quick and enjoyable pace.
I think AC would work better if released on Netflix, if you could binge the whole thing in one go. AoS has the advantage of being set in present time, and while it doesn't affect the movies, the movies affect it. AC's disadvantage is that it's a prequel. Personally I don't mind but then again, I watch and like everything Marvel Studios does