Respawn Co-Founder Vince Zampella said in March that private matches were one of the gameplay elements the developer planned to add after Titanfall's launch, one of the "things that we want in the game that we didn't get to ship in the final game."
The update will also tweak the Gooser Challenge in the game, which the developer also indicated was coming as of late March. The challenge previously required players to kill 50 ejecting pilots, which will be reduced to just five, according to the prior developer blog on the matter. "We went a bit too far with this challenge, especially considering the unique conditions that have to be met in order to have the opportunity to get a kill on an ejecting Pilot," Respawn wrote at the time.
Update: Respawn posted a whole mess of details to its official site for today's patch, which spans all platforms. To name a few, the update will introduce a public test of its private match mode, which supports two to 12 players, a fix for the wall hack exploit on PC, a change to the party colors in the game's mini-map as well as a shortcut to the Xbox One's party app, accessible from all menus.