If you have a look at my posting history you'd see I'm quite a fan of Mejbri. In fact imo he's probably the only of our youngsters who might make it here.
However one decent game and saying he should be the core of our midfield for the future is simply insane. Replacing Bruno/Casemiro with Amrabat/Mount/Mainoo is even crazier. We haven't seen a fecking thing with Amrabat/Mainoo yet to even start thinking about that.
Mejbri had a decent/good game yesterday but imo he still lacks a bit of finesse and his decision making still needs to be much better especially in the most critical moments in order to be a starter. But surely ETH should play him more instead of McT and probably even Eriksen. McT is crap and he doesn't even care. Eriksen is still class but he could not run back and forth for more than 45' anymore. Would be really nice to see if Mejbri would make a challenge for a starting slot against Mount. We have a lot of games so might find a place for both though.
OK, maybe I was a bit crazy suggesting that(I mentioned it as controversial already). By the way, Ten Hag rates Mainoo higher than Hannibal(also 2 years younger, only 18 now), he was impressive against Arsenal in pre season(might not mean much, but still). I also think that you're maybe underestimating Amrabat and what he can do, but we shall see that.
Definitely think that we need to slowly get rid of older players with poor ball retention(Bruno, Casemiro, Eriksen, McTominay) and go in the other direction with younger, energetic midfielders who are comfortable with the ball at their feet, and are not scared of it like it's lava/poisoned. We struggle to keep possession and control games and that has to change if we want to truly be an elite side, someday and compete with the rest of them(City, Bayern, Liverpool, Arsenal, Brighton
, Real Madrid, Barcelona...). We can't allow fecking Burnley(last in the PL table) to dominate possession against us, that's humiliating for a club as supposedly "big" as Manchester United. That midfield performance(Bruno, Eriksen, Casemiro, McTominay) against Bayern(especially in the second half) makes me want to vomit.
Should've also brought someone like Nunes, Kone, Khephren Thuram, Gravenberch(FDJ type of players, ball carriers) in the summer to help fixing that issue, but alas...