I'm not concerned in the least, if it were at place where the supporters make it hostile for an opposing team, I'd be concerned. The Etihaad is not up there, as intimidating places to go. If Citeh want to create a legacy, the 1st place to start would be with their fans. You have a mish mash of old and new, the old resenting the fact they bought success and the new who jumped on the bandwagon because of the bought success.
Guardiola as good a Manager as he is, has never really faced adversity, he's pretty much had everything on a plate for him.
Klopp on the other hand comes from polar opposites...I know which Manager I'd want to oversee a 3 nil 1st leg lead!