With joining of Bergwijn I think Moura will be the one making/sharing room in terms of playing time.
However way you look at his stats, he is not good enough to be a starter.
Since Mourinho took over we have played 17 games (corresponds to 1530 minutes).
Moura has played IN EVERY SINGLE GAME of those. Total of 1247 minutes (whopping 81,5% of all possible minutes).
And what does he have to show for it? 4 goals and 1 assist. That means he has created goal once for 250 minutes.
And on top of that he does contribute very little. I agree he is working back to defense and puts in an effort. But he is not drawing defenders on him creating spaces for others, he is not playing smart through-balls to teammates, hell - mostly he is not even making reasonable decisions and running between flock of defenders, thinking he would dribble through them. Very simply and plainly - not good enough. Not even nearly there.
Just as comparison - Alli has getting a lot of stick from multiple sources of late. What are his figures? 1313 minutes, 6 goals, 2 assists. One goal involvement for every 164 minutes. Son (with bad form of late, suspension and all)? 1104 minutes, 4 goals 5 assists - goal involvement for 122 minutes. Plus both of them offer significantly more all-around impact and creativity to the table.
What if we take his whole time at the club? Well it does not get much better - rate increases to 182 min per goal. But it remains waaaay off from both Son and Dele (not to mention Kane) output.
Moura has been the weakest link. By a county mile.