Was pretty much a pre-covid experience for me on Thursday 30th too, the only difference being that everyone wore masks on the Sky Train. So I went extra early for nothing (mainly DB's fault because the trains on the Ruhr valley were really delayed on the 29th morning - resulting in compo from DB, but on the 30th they were on time).

Passport control took longer than security. The signage at C gates is not good as lots of Germans joined the manual queue when they meant to go to the e-gates, and lots of non-EU somehow ended up at the e-gates when they didn't mean to go there...