I strongly think we should still try for another midfielder in January.
I know we have the numbers for players to play there (I think I counted 8/9 last month), I'm not sure the quality is there if we get a medium term injury to somebody. Jones has done a good job for England u21's there, I think Elliott could do a good job, I think Szoboszlai could do a reasonable job there (that would require a re-jig of the current set up...Chiesa at 10?), Slot doesn't seem to fancy Endo, Morton & McConnell are untested at the highest level and I don't like Trent in there.
If we're serious about challenging for multiple trophies again, unless those not getting game time can make a significant step up, I think we need more depth in there.