I agree that everyone in my party should have the maps but other than that it is a 343 problem. I've never had that problem with halo 3, reach, or any of the CODs.
Why did I spend money on the season pass if I only get to play 4 maps? Seriously... How about we integrate more maps in each playlist.. Specifically the ones that we paid for. I'm so tired of playing val hala and exile. What happened to perdition or wreckage? C'mon.