The only way to look realistically at this is 18 whole months into LvG's reign at OT, this is the best this particular set of players can do with these tactics, a high defensive line, patient build up play and being creative in tight areas in the final third. Some players get it, some others don't and some are good at it while others simply can't perform well under these instructions. But the overall outcome can be described as "not good enough" for a club like Manchester United.
What i'd like to ask is what is in question here? If LvG is a top manager? Of course he is, whoever denies that is biased with possession football in general. The thing is that if we're going to wait for Rooney and Mata to suddenly become world beaters and start working miracles with the ball at their feet while being constantly closed down, we're going to be waiting for a very long time. That's two senior players that's extremely difficult for the club to just ship off. So, what are the manager's plans for them?
It's also quite evident that we need some other players too, a CB, another FB (besides Shaw) with the ability to provide width and offer end product, one more midfielder, a winger who can beat his man and probably the "10" LvG desires. And since we're full of young and talented players a couple of these signings must be players who'll come here and make the difference asap. Does the club or LvG know where to find these players instead of just trying to sign the likes of Ramos, Bale, Muller or Pogba, players who are less likely to come here especially if there's no CL football on the horizon.
And finally, what is the plan for after LvG? We're going through all of this just to give the job to Giggs or to the next available big name? Because if we, let's say, decide to appoint someone like Mourinho or Simeone, all the players have been learning till now will go down the drain. And from what i read in the press, the perfect candidate to succeed LvG is probably going to City next summer.