He won't have much of a future at United.
It's the same mistake that Januzaj did forcing that loan move to Dortmund.
Its' not the same thing. van Gaal rightly advised Januzaj that he would find it hard to break into the starting XI at Dortmund. Januzaj didn't listen to him and it proved true. Pereira is talented enough to nail a starting spot at Valencia for sure.
There will be no grudge. No doubt Jose feels we need Pereira as a back-up in midfield, and even as a winger perhaps at times. And perhaps he wanted Pereira to develop under him this season. But since the Jan recall clause exists, I think its' just a minor gripe, we can still get him back if we need him. I am actually relieved to hear that news.
Its' time for Pereira to step up though. Nowadays, 21 years old is no longer deemed as a "kid", "just developing" etc. Only the ones who perform at a mature level, far above their age, get attention. Look at the pressure on Martial and Mbappe despite their ages. We need to stop looking at Pereira as a kid and start seriously seeing how much he has improved. I think Pereira knows it too, hope he has a stormer of a season.