Mmm I played Resistance Burning Skies but I have never be able to see any met player in my profile. If you go to the friends app that's where it is suppose to appear, but it always appears empty.
The shared play history is similar to the Players Met feature on the PS3. It only works with games that are designed to support it, and supporting it is optional for game developers. Most PS3 games don't support Players Met for their online modes, and most Vita games don't support the shared play history feature. If it doesn't work then it isn't broken. It just isn't supported by the games that you are playing.