Skype would lag the balls off your game anyway, especially with a big crew.
here's my problem with big parties - chit chat. there's tons of it. imagine it now with 12-14 instead of just 8. i could see if it was nothing but comms all the time but that just doesn't happen. i've been in parties of 4 or 5 and it's almost nothing but "hey how ya doin hows your day". now thats fine if you want to just talk with on and other, go right ahead by all means. but i'm good.