Too inconsistent for me, seen him outstanding and equally very poor, but agree in the comparison with Donck.
I suppose the greatest indication is that he’s in and out of the Spurs team too often and often subbed or used off the bench, which tells a story
Ahh ok. Well, I don't take a huge amount from his spell at Spurs.
They often play him out of position and as you say don't ever give him a run of games regardless of if he is outstanding it just seems his face doesn't fit there. Moura had a similar problem with them until recently.
When he was at Betis, he was absolutely phenomenal. Consistently excellent for them over the season including absolutely running the game in a 4-3 win over Barca at the Nou Camp which I saw live. That player walks into our side but whether he is still there after 2 years as a bit part is a gamble.