I personally think he is very overrated and we would do better to cash in on him now if someone is foolish enough to pay 30m or above
For me he has to improve his decision making, when he doesn't have time to think then he's great but I feel he always makes the wrong decision, especially when given a choice between shooting and passing. (Yesterday a good example)
However I think having Sturridge back when take some of the pressure and burden off him!
However we should not be looking to sell our better players.
I think you're bang on with this. That's why he's performing (on average) worse in positions in games that have required him to be more cerebral. He is at his best for the team when he is running in behind and stretching the defense with no time to think. This allows our smarter players like Coutinho to create openings. So often yesterday Sterling didn't make those runs and stopped short clogging up the area just in front of the defense (which is where we spend most of our time). In these situations he's relying on passing it into feet and someone like sturridge pulling off some magic flick to do a one two with him. This fails 90 percent of the time and we end up being impotent in attack.
Fortunately decision making is something that can be coached into you and he is already better at it than when he came, so hopefully that continues. Though it needs to improve a great deal in a short space of time.
Also as an aside, selling him for anything less than crazy money would be stupid as though he might be a tad overrated, we have a severe dearth of quality running through our team so chucking out one of the few players who can make something happen would be foolish in my opinion.