re: Dorgu, I agree, but this wasn't a fact that was known when the season started. When we signed him he was playing RW for Lecce. For us, he never really played LW. Props to Carrick for profiling him as an out and out LW but let's not pretend Wilcox's master plan all along was to play Dorgu LW if we switched to a 4 ATB mid-season.
re: out and out winger, I don't think we necessarily need an out and out winger. Cunha is not a left winger at all, he's more a #10 / second striker and his natural tendency is to be in the middle of the pitch. I think the other three are much more traditional inside forwards who start out wide and cut in as appropriate. To compensate for Cunha's tendencies to drift, Carrick employed a variety of tactics like having Bruno stay left, have Mbeumo / Amad go left whenever Cunha is central etc.
Anyway, the question for me isn't if Cunha is good enough as a LW. The question is mostly around squad planning.
Our initial plan @ #10 when we started the season was that it would be Cunha / Mbeumo as starters backed up by an array of other #10s we have like Amad, Mount, Bruno, Mainoo etc. in a 3-4-3. We were stocked in the #10 position. The real risk was at LWB where we didn't have an alternative when Dorgu was unavailable. There used to be a stat floating about saying we never won a game with Dalot and Mazraoui at WB or somehing like that and our links were to wing backs like Dimarco.
This is what I mean when I say we "over-committed" to the 3-4-3. We got rid of all the natural wingers we had because we expected to be playing 3-4-3 and we had pretty decent cover in most positions there.
Even now it's possible that Cunha does his hamstring on one of these sprints and we're somewhat fecked on the LW. Do you really trust Dorgu to start every game at LW and deliver?