Looks good fun. Whilst there does seem quite a lot going on 2 things will happen when the bosses reach live.
1.) Boss Mods will help make tracking things easier
2.) People will learn what they need to pay attention too and what they don't. There will be things which don't matter to your role so that'll bring the list of stuff to watch out for down a bit.
I do enjoy fights with lots going on, and its about time they had a council fight with all 4 bosses active at the same time.