Ive gotten up to LE over the past 2 years and I stutter in every game I play. My advice is to stay quiet until you know 100% for sure how many enemies are where. Don't go on rambling about how you think they might do a split push A during the first few seconds of the game. Make short, quick communications such as "3 long doors, pushing now". Once you die, tell people where you died and how many there are around you and then STAY QUIET.