I'm enjoying the arrogance of the op. Has only a few clears, but is expecting perfection...in a PUG.
I've cleared many more times than you have, and know this fight can go from perfect to implosion in one mistake. Phase changes in this fight can be as bad as in T7 if the party has never seen then go wrong and d9es not know how to correct for them. An accidental overcharge by a tank can change the clear/gather schedule and can wipe a party in p3 if it's not called out and corrected for. A natural just barely hitting or missing the chaosed can kill 2 or more in a second, changing swaps depending on who died.

Calling out, through macro or voice, to clear or to not clear is simple and can save a run. Refusing to use all the tools at your disposal only reflects poorly on you.

If you are with your static and are comfortable with no call outs, go ahead. In a PUG with randoms...better safe than sorry.