It's a tricky one with regards to his contract because I am sure his people will be pushing for him to be one of the top earners on a new contract, yet his performances have been nowhere near the best in the squad.
I'd like to see him given a new 4/5 year deal, but not as top earner. His value will remain high for a couple of seasons even if he doesn't progress exactly as expected, so a new contract isn't a massive risk, but it's getting the wage right that may be tricky. Too low an offer and he won't sign, too high and you'll have loads of players in the squad asking for parity.