Definitely do not agree he's as good as most of those players. I think he's not as good as many of those players and has not done nearly enough to prove otherwise yet. He has the potential to become as good or better than them, but is not today.
From a club standpoint - He has no role in our system. He is not a starter in any position in our system. In fact, if the whole squad were fit, I'm not even sure he's our first rotation option off the bench for any position. We need and will likely add more talent in CM and #10 spots, justifiably moving him further down the pecking order. And he's not a better prospect than Garnacho, who is on 50k p/w.
The reason why he thinks he can ask for more is because we had to play him a lot last season. But that's because of our shortcomings in his role, which we're slowly correcting for, and not a reflection of his overall quality.
Anything more than 50-60k would not make sense right now. If he insists upon more than that then IMO it will be better strategically for the club to take the FFP gain from selling him this summer while he still has multiple years left on current contract.