I can't really offer players up but if I'm being honest (this is harsh) but
George not dominate enough in the tight,
Sinckler is a passenger in most games these days for England,
Itoje is an average 6, not a lock and not a tight player,
I love Ludlam but he's not massive, so you need a bigger 8 and Dombrant isn't that.
Then Willis at 7 needs more time,
Dombrant just isn't big enough nor does he seem to be cutting it at this level yet.
So I can't offer solutions but o can say that I'd happy look for replacements for hooker, TH, lock (Itoje), 8 but not 6 or 6 but not 8.
I agree with the posts above though that our players look smaller and weaker compared to most other nations at the moment.
Not sure what the short term option is.
Dunn, Collier, ribbons and a curry/ Willis back row with mercer when he's back at 8?
Really don't know.