Crimson Map Pack not adding new players

Why does the crimson map pack not replace players that have dropped out of the game like the original maps do?

This is the best feature of matchmaking, knowing you will mostly have a complete team. I played big team slayer on shattered. We started with sixteen. When the map was chosen three people dropped out. Within a minute two more, then it was just me versus eight other opponents. This sucks. I won’t vote for another crimson map until it is fixed.

Yeah i played a full match of 4v4 slayer on Harvest and not a single player joined to make it 6v6.

Edit

Just now i played Shatter in BTB and no players joined, ended with 5v0 so i’m guessing even with this so called Trial Offer that there’s still not many players with the DLC, making it hard to join mid DLC games.

I’ve got thrown in mid/late game on shatter a couple times, I hope they make at least a couple lists dlc required, I’d prefer them mixed into btb not just shatter wreckage and 1 old map noone seems to wanna play anymore, I’d like to try harvest in 8v8 for a week as well, I’d bet it’s more fun then 4s on it. They are doing weekly updates I don’t see the harm in trying maps outside the current lists, ctf on exile looked pretty fun at E3 where is it now?