I like Hidalgo too, and I don't expect him to lose playing time, although Houston's outfield situation isn't quite settled yet. He's best in relatively shallow leagues where he can be played in home games (anybody else surprised by his weak road numbers so far?) or to exploit pitching matchups. I wouldn't give Urbina for him, however, at least not in a standard roto league. Saves are simply too hard to come by.
In most h2h or points leagues, on the other hand, I would accept this deal, especially if you have daily lineup changes in a points league, or if you're in one of the h2h leagues that limits games pitched but not innings.