There is more than one way to speed run a dungeon. Your way is not the only way.
If I, the tank, take off on a different route than you are used to, saying "WAIT NOOB TANK STOP OMFG GG" is not the way to get us back on track. If you didnt want me to take the lead and go the route that I've used to farm over 50 3-chest runs then dont start the timer the second I zone in without saying a word. I don't mind learning new routes, but communication prior to starting the run is nice.
Thanks,
Your friendly neighborhood Firminator