Elo there...
first of all, i like orkham rlly much, its shorter than dc, has a lot of funny events, trash diversity is very high and you can't solve everything with "just burst". The instance felt like a mixture of Tikal, IDK and ROFL but you only have the fun parts of those instances 
BUT could you please put the real endboss at the actual end of the instance? Right now that Muddrass and his Buddies feels much stronger and more complex than the Ascended Xemen, which isn't feeling well. I mean, you have 3 phases and the boss(es) in each phase have different attack patterns, casts, you need entirely different gameplay to pass them, take care of positioning, run away from stuff, dodge stuff, use cleanses, be aware of aggro resets, there are actually multiple oneshot events. Even the Zhargos Worldboss on HM has less mechanics than this. This is by far one of the most complex bosses in the entire game and it's a FIRST boss 🤯
Imagine you're running IDK but have to kill Thynos instead of Mole King at the very beginning. Or run Lv 72 ini (dont remember the name rn) and Da'Dalodin is your first encounter. You can do it, but after that intense fight, the entire instance still awaits to be run (and the manticore dude are nothing compared to orkham crocs and his friends at all)!
On our firstclear the boss felt really good. you were able to skip the annoying stuff and burst it down if you had enough DPS. But then you changed 1000 things and now it feels like we were attempting on an entirely new instance that held us down from starting to farm it properly.
So please either disarm the boss so it's not as deadly anymore, or make players able to skip certain difficult events in phase 2 and 3 by DPS. In orkham it generally feels like you're punished for dealing more damage, which leads me to the question why I even should progress any further with my gear?! Doesn't make sense to me rn... 