Thats a lot of crap all going on at once.
this boss looks like a f word banger
I'm a fan of challenging content but sometimes Blizzard just pukes mechanics all over the fights. It just becomes a visual nightmare which is why top guilds use a million different custom WAs. Then eventually they nerf it so that those mechanics are irrelevant by the end of the tier. Just create the fight once for the general Mythic audience and let the race be a race, not the specifically tuned encounter for 2-3 guilds.