The changes to the market include making more previously released items available, improving the search interface for collections, and changing the names of rarity labels for lockbox items. Speaking of which, BioWare is promising better quality items in each cartel pack with each one guaranteed to hold a toy, armor, mount, or decoration and one other thing.
BioWare has in store for Star Wars: The Old Republic: Knights of the Fallen Empire. The studio is also streamlining the game’s cartel market and making some adjustments to the contents of cartel packs.
Source: SWTOR. Thanks to Mikey Moo for the tip!