First you could access all of the Titanfall DLC maps, now you can find people to play on them. Respawn has added all of the Titanfall DLC map packs, now available free for all players, to their standard playlists in an effort to improve matchmaking.
The update has already arrived for the PC version, with Xbox One and Xbox 360 playlist updates to arrive shortly. Respawn’s Rayme Vinson tweeted the following confirmation:
Now that our DLC maps are free (forever, etc), we're starting to merge them into almost every playlist. This'll also improve matchmaking.
— Rayme Vinson (@RaymeCVinson) March 31, 2015
Titanfall is available now for Xbox One, Xbox 360 and PC via Origin.