Very strange way to view things, he had 2 years out of football, everything else going on (Maybe due to him, not debating that) but then went to a foreign country in a team much worse than ours (Evidenced by their position in a weaker league), yet he has 6 goals and 5 assists in 1947 minutes so a goal or assist every 177 mins.
For context, Antony is every 1,097 mins, Garnacho is every 200 mins, Rashford is 241 mins, Hojlund is every 191 mins.
That's not to say keep Greenwood (Which I would) but considering everything they are pretty good stats for a winger in a 4-4-2 which involves more defensive responsibility than a 4-2-3-1 we play.
I don't think they're the stats or performances of a player you'd move heaven and hell for to bring them back in though.