After having watched Age of Ultron, put me down as a "No thank you."
He pretty much botched the climatic fight scene in that movie. I don't know how you do that, but he sucked all the dramatic tension out of the last 30 minutes of the movie. I left the theater confused. "That was it?"
I'm of the opinion that the newness of the first Avengers movie, combined with some really good character performances (Tom Hiddleston as Loki) sort of glossed over the fact that he's actually bad at action movies. It was all on the line in Age of Ultron, and frankly - he didn't deliver.
I honestly don't feel like he could do better with Star Wars.