Perhaps people want Klopp because he comes across as a bit crazy, and City as a football club is also a bit crazy.
A crazy manager for a crazy football club, what could possibly go wrong !
On Klopps footballing style whats to say he wouldn't want to play a more possession based game, I imagine it would have been quite difficult to at dortmund as they kept losing their best players every season.
On what would happen to the likes of Silva, he had Kagawa as an important member of his team for a while didn't he? a similar sort of player, So I wouldn't be that worried.
Honestly though pretty much anyone is better that Pellegrini.