Yeah, I'm pretty sure that the Unreal fights have to be manually tuned for the current max level, it's not just a "up all the stats algorithmically and done" setup.

This can also get messed up on, which is why we had womp womp episodes like Shiva (where many veteran raiders felt the DPS check was way, way, way too tight, which wasn't even the case with the OG level 50 Shiva EX).