The scripted fights do get very boring; the over reliance on step by step predictability makes fights a dance, so winning them becomes more or less a matter of memorizing all the boss' attack patterns, where to stand and when.

It's fun to figure them out, but as a casual I don't often bother with EX fights and with only one dungeon per patch these days it gets very dull. Even the big raid fights eventually become predictable and easy; I challenge myself to clear them without getting a Vuln Up debuff and once I manage that it's impressively boring.

I recently jumped back onto WoW in preparation for the next expack; while the world isn't as pretty and the most current expack's story was... lacking to say the least, the boss fights are much more hectic. Even if you know everything the boss can do it still takes a considerable amount of attention to stay alive and win because there's an element of randomness to a lot of it, fights are generally much faster, and the bosses don't telegraph their attacks nearly as much. (The main problem with the game at present is a labyrinthine system of temporary powers that come and go with expacks, intended major pieces of content that fell flat on their face like the Diadem and Eureka, and lots of required daily / weekly content you need to keep up with. Mobile gaming systems are not enjoyable outside of their home environment!)