Seems a bit like it, Hiddink is just too old and can't connect to the team anymore.
van Gaal build the team on strategies and plays, making sure everybody knows their role and will work their ass of to do what is told. Reason why youngsters normally flourish with van Gaal, because they won't argue what they need to do. With Barca and Bayern he clinched with the older guys (van Bommel, Ribery, Rivaldo).
Hiddink is all about team chemistry, and letting the team decide the path to take. It will work if the team has the capacity to have leaders who set the path ('98 with F. de Boer, Bergkamp & Jonk), but the current squad lacks of that simply because the player that leads the team is Robben, and has been injured most of the matches. Sneijder isn't that influential anymore, and van Persie just lacks the leadership within the whole team.
This team needs a coach who tells the team what their job is, and doesn't mind to bench or drops a player who isn't doing theirs.
Reason why I don't believe Blind will change that between now and November.