He might be good, but he is not good enough to play for Man Utd. Like I said earlier Southampton is his level.
It is relevant. It's long term plannning. Why spunk a year on the likes of Ings when there already players who can do the same job and can cover that position. You take the season to transition Greenwood to central striker. Make it clear to Martial it's his last chance to kick on, if he doesn't take it he's gone.
Generate funds by selling the likes of Fred, Jones, James, Dalot, Lingard and Perreira. There's the guts of 100m to spend on the squad.