They became a better team and started to climb the table from the poor position they were in up to his arrival. How is that not reviving them?
Arteta has revived Arsenal. Doesn't mean they've won anything. Glasner has revived Crystal Palace, doesn't mean they've won anything. Pochettino is considered to have revived Chelsea by the end of the season, doesn't mean they've won anything.
VK doesn't have a magic wand, to suddenly make a failing team into champions before their time. Bayern aren't failing as bad as Anderlecht were though, and they definitely aren't doing as poor as Burnley were. Where you start the job at, determines what is possible during your reign and how long it might take to get there.
^This is what people don't seem to get about the Burnley job, and it seems like you don't get that about the Anderlecht job in this case.