Manchester United is starting to realize their strikers are not good enough. They're eyeing Mateta from Palace to be signed in summer window. I know people might be rarely heard about his name, but he scored 12 goals combined with 2 assist. This is far better than hojlund (2 goals/22 matches)/Zirkzee (3 goals/27 matches).
This is smart move, selling Hojlund/Zirkzee, which was flop, then replace it with Mateta. Mateta is good enough as a striker, and has huge potential to be explored.
It is an old topic and missing the Champions League will cause them the most problems. It is not the problem they could think they are facing, but the sheer fact that they are not in the top game anymore.