You'd put him on the wing sometimes because of his MOTM performances like the 0-4 win away to Levante. Thiago is in the squad too so he's also in the rotation. There isn't enough playing time and considering the underperformance of the wingers Iniesta a valid option there. And in big away games, having a double pivot with the Don on the wing and Alba overlapping a la Spain I would say is the best option.
How can u say Tello is underperforming given the amount of playing time he gets? You talk about not not enough playing time and yet u want the Don to play on the wings making Villa Tello Alexis to fight for one spot since Pedro cant seem to get himself benched. This should be the rotation plan
Xavi/Don with Thiago/Cesc
Busi with Song
Puyol/Pique with Masch/Bartra
Montoya/Adriano with Alves/Alba
Villa/Pedro with Alexis/Tello
Messi with Messi
There you have it enough play time for everybody without destroying the width/attacking power of the team