Leaving:

Ox, Keita, Milner

Rough around the edges but promising:

Bajcetic, Elliott

Good rotational options:

Fabinho (varies from great to worst player on the pitch), Henderson

Starter quality but injury-prone:

Thiago

Not good enough/unproven:

Morton, Jones

Starter quality + reliable:

No one.

I really do think we need 3 midfielders, all of whom fit into that empty category of being both starter quality and reliable. Something like Bellingham, Nunes, Mount would genuinely be perfect. Plenty of competition and rotation available so that we don't run players into the ground and compromise our depth in the future, while having plenty of lineups that would be of a consistently high quality.