Confirmed. I'm not finding any new bosses. Because I never fought the one on Hades materia. -.-
I don't like to follow walkthroughs because I prefer to play games on my own no matter how difficult they are, so that's why I've only noticed now. I've checked EQ2Alyza's videos on youtube a few times however, but only when I was really stuck, so I haven't seen any new bosses I might have missed. But I do know for sure that my game is just as hard as her's. I even have the equipment tweaks and materia tweaks like only being able to summon 1 summon per battle, etc.
I dunno how I could've gotten this difficulty and not the new bosses. O.o Anyway, to fix this I just need to re-install this mod again, simple as that, right? Dammit...