To me he is a hot and cold player ( a little like Son was during his first season here) and you do not always see him at his best because of that. Son has developed during his time here as a very good player, lets hope Moura does the same ( he has the ability to do so).
You also have to consider that we can't expect him to be something he isn't. I get the feeling that many of us see Moura as a dribbler at speed - someone to tie defenders up in knots, full of skills and trickery.
Well, he isn't, and I don't think he ever has been. He's just not a great dribbler, and PSG fans pointed out as much when we bought him. He's not a Zaha analogue.
He runs very fast, in a very straight line - that was the consensus of PSG fans. Well, that, he works hard, and he can finish pretty well.
If we accept his limitations, we can play to his strengths - and his three key strengths are precisely those. He can finish well (when on form), he can press from the front very well and he's very fast from a standing start. Like Son, except without the two-footedness.
I don't think it's a coincidence that his best form came when played in Son's role at the start of the season, off Kane. And I think, long-term, that's what his role will be - rotating in and out of the side with Sonny, as our inside-forward.