I can see United breaking the summer transfer window total spend records - either they do that or mid table mediocrity beckons.
De Gea - surely this year Real will snag him
Lindelof - Their Mangala
Blind - sidelined
Luke Shaw - broken
Darmian - sidelined
Valencia - on last legs
Carrick - gone
Pogba - fallen out
Fellaini - going
Young - on last legs
Sanchez - Getting slower and slower
Martial - pissed off (had his entire AMNumber branding ready to go, when he lost that number IIRC)
Lingard - will follow his dab partner to the ends of the earth
Rashford - dicked about with
Ibrahimovic - going
So even if some of that doesn't occur, they're going to need to replace almost an entire starting 11
just to stand still.
Looking at their recent history of incoming transfers:
https://www.transfermarkt.co.uk/manchester-united/alletransfers/verein/985
..it's a pretty dire the amount of short term churn in the previous 4 seasons
14/15
Di Maria - gone
Shaw - dead and buried
Herrera
Rojo
Savic - gone + Who?
Blind - sidelined
Falcao - crocked and then playing better when he left
15/16
Martial - not happy
Schneiderlin - moved on
Depay - moved on
Darmian - sidelined
Schweinsteiger - moved on
16/17
Pogba - not a happy haircut
Mkhitaryan - moved on
Bailly
Ibrahimovic - let go/moved on
That's an abysmal hit rate (similar to ours on 'misses' 12/13 to 14/15
https://www.transfermarkt.co.uk/manchester-city/alletransfers/verein/281 )