The only slight concern, according to that reddit review, is that bailly and Lindelof both appear to prefer the rcb position currently.
Given prices these days even @ 10 m euros addons for a decent young and experienced cb its a good deal for all concerned.
I actually wouldn't be averse to utd going for a 2nd cb, although this would limit the kids coming through, with rojo probably out until the new year ( and likely not fully fit until next summer) - it's Jones & smelling being so inconstant that's most worrying....and the amount of injuries utd rack up most seasons.
Obviously more offensive players have to come in first, and even a proper dm. but looks like these are well in the pipeline ( really hope jm doesn't go for matic, really haven't been that impressed with him after his 1st season back with Chelse).
The other slightly concerning thing is about belotti / rooney issue - ie with morata nearly done, with the rumours/ hints that rooney is thinking about sitting where he is for his final year will this have any effect on belotti or any other striker deal this summer? I really thought rooney would primarily want to play more, but doesn't look like the case atm