I wholeheartedly concur with this sentiment. There have been "Master Boss Patterns" since way back when in gaming. Try playing through Contra Hard Corps (Sega Genesis), BattleToads (NES), or any of the Megaman games. There are parts to remember in all of these games in order to get through them.
Memorization has always been in games, it doesn't surprise me that it found its way into this MMO.