Where are you getting the idea that I feel paulinho is playing to the best of his ability?
In fact isnt one of my main criticsms of him that he doesn't try, that he backs away from challenges all the time, that hes perfectly happy to hide and allow his cm partner to do all the work.
In terms of effort it's not even comparable. It's shocking that Ade gets criticised for his lack of effort whilst paulinho is allowed to hide in every game and do nothing (I think now most have clocked on that he does this thankfully).
You yourself described Paulinho as a "very, very, very, very poor player" - most neutrals would describe his play this season as poor or very poor. That means he's playing above his ability by at least three verys. I'd say that's quite an achievement - you could almost say that by your own standards you've set for him, he's playing out of his skin when considering his "very, very, very, very poor" natural ability.
Ade, on the other hand, we all know has the ability to be world class when he chooses to. Instead he's chosen to trap the ball 20 yards, pass to the linesman, and lose all ability to walk/run like someone in possession of two working legs when in and around the box.
If Paulinho turns out to just be **** then that's one for the "miss" list on our transfer history. We all know Ade is much, much better than **** we just can't afford to make him like that again.