I agree with the move, at least offensively: Aaron would be a top-of-the-line 2Bman with the bat, and Larson would bring up the Reds' power numbers at the corners to an acceptable level. I also think that Aaron's shortcoming at third base is his arm, which would be solved at second. The question in the move is how good is Larson defensively. Keep Lark at short and spell him often with Lopez. Seems good to me.
"Don't trust any statistics you did not fake yourself."--Winston Churchill