I like it! You are ahead in development with better pawn structure. Black has a terrible bishop comparing to your minor pieces. I believe your quality of activity compensates the exchange when it's easier for White to play against the hanging pawns.
It must be the opening! I have seen Nakamura doing weird stuff with 1.b3 in he's speed games.
I hung my rook in this game, yet still managed to make the best of it.