[quote=“Maveco, post:2, topic:519224, full:true”]Past lvl50 you’ll need to start playing at uvhm in order to level faster.[/quote]+that. Also, you need “UVHM Upgrade Pack 2”: http://borderlands.wikia.com/wiki/Add-on_content
OP levels are unlocked by completing a run through Digistruct Peak at your current OP level, which will be OP0 if you just got the DLC. If you do it solo, this requires you to quit to the main menu after each run, increase your OP level, then start again.
NOTE: Doing it at an OP level lower than your max gets you nothing, especially since the host sets the OP cap. Good way to ballpark the host's OP setting is to check the vending machines -- if you see nothing lower than OP6 or OP7, there's a good chance the host is running at OP8.
If you’re having a hard time running it solo, jumping into the session of an equal(-or higher)-level host is suggested. This will get you the unlock provided that
- they don’t die [=they get booted from it and have to redo it or sit it out], and
- you jump in before they kill the last enemy.


Sounds more like ‘forgot to update’.
but some might be good tips.