I like Endo, and I hope he has a squad role with us for another season or two, but it's obvious in every game we play that he is targeted by opposition managers as a weak-link on the ball.
Watch closely and you'll notice that every time he is on the ball for more than a few seconds, he is immediately pressed, in a way that MacAllister, Szobo, Jones, Elliott aren't.
As he isnt the best on the ball, he has been caught in possession a few times in recent games, and I think the team needs a new first choice DM, who is strong on the ball, to which Endo would then take on a squad role/cup games.