Main criticism: Lingard doesn't score enough goals this season.
Why Mourinho still play him regularly?
Lingard can do the
tactical roles better, and will put more effort than the other options (Martial and Mkhi).
Remember that Mata is often the first choice here than Lingard because he do that roles even better with goals.
Also, Mkhi for a small period do that well too when he took over the position from Lingard before this.
Other than that, I see Mourinho usually use Lingard as the good alternative
back-up option whenever M & M are in bad form like at the moment, even if Lingard is in bad form too like recently, at least he will for sure contribute more than them - defensive work, pressure, ball recycling possession etc. Jose trusts him to do that much.
Jose will keep on subbing in M & M in games to gain their form, often replacing Lingard. We don't want M & M to start and cost us conceding goals from making costly mistakes or just being passengers in games.
That's what I noticed anyway. So until M & M improve and get their good forms back, Jose have to start Lingard.
Also, the academy factor could play a tiny small part as well, evidence from the early part of this season.
Let's have good discussions with ethical respect~