How often, in reality, are there fights that require throwing out mid combat "Hey, do 'X'." Very few. The way the game is set up, it takes some next level inexperience where this would be a necessity in normal content. Not that it doesnt happen, but rather Id hazard 90% of the time you can wait till the pull is over to say something. And since boss monsters arent the first thing you run into, if people are as skilled as they claim, theyll notice it well before then.