There is no max however in playthrough 1 of both borderlands 2 and the pre sequel but I believe both the Warrior and the Sentinel were level 32, I can’t remember for the destroyer. If you do most or all the side quests you will be about that level when you finish the playthrough. If you power level you can get to any level that is available within the game. In part of my assumption I have presumed that no power levelling will take place and it will just be the average that people will finish at. I have heard reviewers found themselves at level 40 by the end of playthrough 1 so I am happy for my assumptions to be wrong. I will happily recreate the videos on playing through the game and seeing