I think he's just a convenient target for everyone's frustration about this season. I don't think he's downed tools, he wouldn't be getting picked every week (regardless of how few options we have) if he had. I do think he's knackered and it's entirely possible his intensity and desire have dropped slightly - that's not the same as not trying though.
I'd be shocked if he doesn't get his move. Let's say that in a world where he was under contract, he has a market value of £4m (which is maybe half of what it was last year). A club can give him a £2m signing on fee and still be £2m up on the deal (using football club logic). The club he moves to get him on the cheap, he becomes a millionaire overnight and it probably doesn't matter if they give him less than what we've offered him. I'd say he knows exactly where he's going already.
He might be choosing between £2m and a 3 year contract on £20,000 a week or a 3 year contract on £20,000 (but with a clause that it drops to £10,000 a week in the Championship). Why is it so hard to understand why he might choose the former?