Haha I did indeed, and I completely agree with you. Alas, it was the only example I could think of at short notice
Prior to him there were no bosses I even had to think twice about the abilities of when I raid lead my guild. When it got to him suddenly there was a lot of stuff and I thought "whoa" before realising how most of it could be ignored. Sure there's a bunch more spells on Paragons but sooooo many of them can be ignored (especially how they interact with who is still alive) that it does boil down to pretty simple terms very quickly