I was talking with @Dibz about stuff like this the other day. My Ideas were more along the lines of achievements though with the possibility of small rewards (like completing dex really should have a reward, JUST SAYIN) Maybe having a second tab to the trainer card that could have "badges" for achieving certain things in game. Harder achievements to complete could award players with a new untradeable vanity or something that could only be obtained by completing the achievement. I think, like you said, its one of those things that "...could be good but would never be a priority" but it is worth putting it out there. What I am talking about it a little different than what you're saying but I felt like adding on, lol.