Well it seems to be all for naught as Wenger pooh-poohed the rumors of Arsenal going after Quintero.
I will say though, that I think the slightness of frame you mentioned is a bit over-stressed. Look at your boys, Coutinho and Sterling...not exactly physical bangers. We've had Cazorla play very well. David Silva is easily one of the most influential attacking players in the entire league. I also think that AW's system, more than any in the PL, allows for smaller, technical players to shine.