Yep, not my (or Jose's it seems, Carrick was injured at the start of the season iirc) first choice to put in a combination if C/P/H are fit but he is definitely capable backup in all three positions if one of them goes down. (Anchor, MF2 or further forward he's fine in any of those roles). I just asked because I think Carrick is injured, I think I prefer him at the base like at the start of the season and have Herrera beating the press from further up with Pogba. Pogba has the ability to hold the ball up further up the field but he might go with Fellaini in that role (similar to Val Gaal where he would play over the press) and they both work well with Herrera in a pass and move sense. Even if Fellaini doesn't venture forward much from the anchor position at 6, if he can transition the ball forward like he did from there at the start of the season then he will be fine. Carrick should start if he is fit though, no denying that.
Anyway, that user just posts relentless amounts of unending drivel when it comes to the players that they don't like. Case and point above, not a coherent argument or anything worth engaging in, just a torrent of bile and if you don't think the same way then it must be a WUM. Tiresome and not worth engaging with so I wouldn't bother.