I don't think the endgame content is too easy or too hard. It feels just about right to me. And I hate RNG fights so I really don't want them to go that route because then it hits a point where you will needlessly wipe on content because you didn't pray hard enough to the RNG Gods to avoid death (Lich King from WoW was the definition of what an RNG fight looks like. Veteran groups with multiple kills and lots of gear under their belts would still occasionally wipe on this fight due to RNG... How is that "fun"? You did everything perfectly, but because of RNG you die? Scripted fights are fine, especially ones that you can come up with multiple strategies to find a solution (T4 and T5 are very good examples of this). It takes you a while to figure the fight out, then once you get the magic formula and everyone executes it correctly it can be repeated every time.