Thanks to the great insights from German guys on the Forum. Hope you stick with the Forum and WBA!
I'm more than convinced that Rangnick is the right man for WBA. The structure of having a Director of Football/general manager will be normal for him. He may have had problems with the manager whilst at Schalke, but personality clashes can happen anywhere. I'm sure DA would involve him 100% in the recruitment of new players. If the present delay is down to Rangnick, then it may be wanting assurances about future recruitment policy at WBA.
He may also be waiting if there are other offers, but it would probably have to be a massive Bundesliga club to tempt him. Bayer Leverkusen may be on the lookout, but they strike me as being more of a company team, albeit well financed, rather than what the Germans call a "Traditionsclub" e.g. Schalke or Borussia Dortmund. I don't think he can be watching the Prem. league situation with the Liverpool and Villa jobs now filled. We would be a more attractive proposition than Norwich or Swansea.
If the delay is from Albion's side, you'd hope it would be for some phenomenal candidate. To be honest, I don't know who that would be. Rangnick ticks all the boxes. Plays attractive attacking football and has had success with it.
Whilst not wishing to ailienate the other German fans, (Gruess euch alle!), Schalke does seem to have alot in common with Albion. I travel alot in the Ruhr district, just a larger version of Black Country. You see S04 (Schalke 04) car stickers everywhere, they are blue and white, and fierce rivals of Dortmund who are black and yellow/old gold. Although Dortmund are somewhat more successful than their black/old gold counterparts in the Black Country.