I think Sergio might become a better player than MGP. I've been impressed by his crosses in many a game. If he can buckle down, up his work rate, and learn from our more experienced players he might just be brilliant for us.
You all know what MGP has been doing with his corners this season, woefull. For a guy that's 1. A winger. 2. Takes almost all set-pieces. He really should have more assists. I don't think MGP can improve much given that he lacks speed, and to be frank, some skill. Maybe he could improve his general play slightly. Though, MGP is a hard player to replace because of his ability to kill off games all by his lonesome. A good premiership side is dependant on midfielders coming up with a few goals.