I believe Ole has actually gotten the best out of the material he has available. A shitty start, that's obvious (Currently trailing Pool by 3 and City by 1), but looking at the last 6 months instead of 3 games:
Martial: Elevated after Solskjær
Rashford: Elevated after Solskjær
Greenwood: Elevated after Solskjær
Bruno: Elevated after Solskjær
Shaw: Elevated after Solskjær
Pogba: Handled the situation in a balanced way, so he hasn't created a big stir causing even more unrest at United than he did under Mourinho.
Matic: Elevated after Solskjær (he's even old)
AWB: Unpopular opinion, as he's made the new scapegoat/ashley young, but I think he's done an alright job, from what skills we knew he did and did not have.
Then there is the questions about the players who cost us dearly / or players who have not reached their potential:
Lindelöf: Can he get better than this? (I don't think so)
Maguire: Can he be better than this? (Probably - Seems unfocused after the Greece incident. Ole has some influence here to take action)
Bailly: Can he be better than this? (Probably, but no manager has made him tick, and he's always cost us by being very rash/overly risky in his decisions)
De Gea: Unfocused, not consistent class anymore. Right decision to give him competition. This could go both ways, but with Henderson, at least we have a decent backup if De Gea fails. Good decision from Ole.
+ He has the backing of the players, which cannot be said of other
+ He has made Manchester United fans more understanding about patience. We clearly need to have patience, when we can't buy our way to succes (Sancho, Grealish, etc)
+ He's made us playing attacking football again. What moany periods of football Van Gaal and Jose were.
So all in all, what would Poch have done better with this material? I'm not a 100% pro-Ole. I just don't see why going for Poch would be that different.
The levels Ole has taken these players, to me, seems like about the same level Poch would have taken them to. Ole doesn't get the players he wants, so why should Poch and what would it change?