In defense, Davies Dier Sanchez with Tanganga and Romero is good enough for the rest of this season. Rodon can be moved on. Romero perhaps shouldn't be bought, and another (L)CB brought in during the summer.
At wingback, Reggie and Sess are good enough with enough upside to continue with at LWB. Emerson is alright, and Doherty good enough to be an understudy. Would be great to get an attacking RWB to challenge Emerson, but we can probably wait til summer for this.
In midfield, we seem to have found solid performers in Skipp, PEH and Winks. NDombele and Lo Celso can be sold. I doubt we can sell both in the winter window, so, might be forced to play them until the summer when we can look to move both on, assess Matar Sarr to see if he is ready to recall, or look to purchase another CM.
Dele has improved but still doesn't look to be cutting it at the top level, and should be moved on.
In attack Kane, Son and Lucas look to be a solid front three. Bergwijn and Gil backing them up appears to look good, but an injury to any of Kane or Son would likely leave us too underpowered in attack. Overall we appear to be lacking one quality player worth of depth in attack.
In this winter window I'd like to see us secure a versatile attacker, sell Dele, and then after that, in order, if possible buy a RWB, a CM, and then a LCB. I don't think we'll have much ammo to buy much more than another versatile attacker though, and that would probably be good enough to get us through to the summer when Conte can make more drastic changes to the squad.