What about cameras and some stealth needed through buildings and something to challenge jumping and gliding abilities like towers with rewards on top of them and keys to collect to open hidden passages or caverns with rewards in them and pike races and remote factions to be discovered, I think the caravans are a good idea. The patrol missions need work too, they are way to mindless, they could be a bit more puzzle like or specific and not just involve shooting things or scanning something, they could involve some of the things I suggested above