Squad has deteriorated and lost form. That is a factor. Our defence - all our experienced defenders gone in one swell shot. No Vidic, Ferdinand and Evra. Ferdinand had declined a bit, but Vidic and Evra were still necessary, atleast for this season. Not to mention, two of our captains. Only Jones has looked in any bit of form from our old defence.
Also lost another captain in Giggs, and that's a tremendous loss of experience there. Carrick is still injured, and maybe short of confidence after Moyes era. Cleverley was probably forever ruined by Moyes (or probably was just as bad earlier, but it was masked over by Ferguson's brilliance). Fletcher is yet to completely go back to pre-injury level. Fellaini... Well, let's not talk about him atm, I'm hoping LvG can still do some magic with him.
The point is, yes we dropped off because Moyes ****** up. But just assuming that Moyes era didn't leave us in tatters, you'll probably be just kidding yourself. Form and confidence are just as important as anything else. And after Moyes, that was in tatters. LvG is fixing it, but as stated before, takes time.
Also, after Benitez, your squad was still whole, and you still had a respectable finish with a trophy, I believe. Compare that with us, we've had our most disastrous season in a while, most of our experienced players and captains have left, lots of newcomers in, and you can see why everyone is saying we need time. To suggest anything would be foolish, it takes time for a new team to gel in, and that's not even counting in an entirely new formation and philosophy.
If just having a team with WC players were enough to win a trophy, PSG would be bossing it around in the CL (Ibra, Cavani, Silva, Moura whatnot). Yes, with a team with WC players, you're expected to win. But that's once the team has adjusted and gelled.
Don't get me wrong, by January, if we're around 5-6 points off the top, and some idiot reporter or w/e tries to write us off as challengers, I'd be furious, and that applies to LvG too. We should be aiming for the title that time. But reaching that level by January is a bonus, is essentially what is being said/