The problem has been solved and patch 1.04 finally lets me play through the campaign in the pre sequel! :-))
I’m beyond angry right now!
About a year ago I bought the HC for 40 euros and had massive freezing problems and thankfully the store I bought the game from let me return it. The whole experience was really dissapointing bc I never had any problems with BL 2 on my PS3. I now bought the digital version of the HC on PSN (bc. I heard that a massive patch in January adressed the freezing problems) - problem is, that the now downloaded version of the game is and stays at V. 1.0. The console tells me that I have already the latest version which is in no way possible bc the game is around 28GB big (which from what I have found on the internet really is the size of the game WITHOUT even day-one patch?!?!).