The Vita version of Borderlands 2 had some shortcomings compared to the console version, but hopefully the latest update will help to address some of those issues.
Developer Iron Galaxy has been working with Sony in order to help improve the game. The latest update, which brings the game up to version 1.04, addresses the game's general stability, and tweak some of the game's control options. Gyroscope players can now invert the aim, and the scaling of the back touch panels can now be adjusted so actions don't activated by accidental touches.
[Source: PlayStation blog]