If anyone is ever interested in partying up and bringing up our chances of getting into some DLC maps (meaning you have the DLC maps), or if you already do this, send a friend request to me (GT to the left… that’s a zero in the name, not an O). I bought the Defiant map pack back in November-ish and then promptly got lost in Battlefield 3 for 9 months, but now I’m back to playing Reach in anticipation for Halo 4. Of course I have the same problem everybody else does with the lack DLC playlists and have only gotten to play on a Defiant map once… so yeah.
tl;dr
If you have the DLC and want to party up, send a FR to me.