We were talking about this a while ago in IRC, and I think it's an interesting suggestion: Allow snipers to climb up trees.
Currently snipers are quite useless in terrain, since when it's bumpy, the bullet will likely hit a hill between you and the target.
Sniper fires slowly, and therefore a bullet miss without cover = Death.
We were also interested on giving snipers some static camouflage - this would add the possibility for that, too. Climb in a tree and you're hidden from the enemies. Bots could notice you after two shots. Players will notice you if they're carefully looking at the tracers

So, making the snipers able to climb trees would fix both of these 'problems', and add badass level to playing as a sniper, or something like that.
Climbing to a tree could work by pressing space next to one, and pushing the movement key. While being in a tree you could stand, crouch, prone and aim at 360 degrees, but not able to move. Or you are, but moving will make you drop from the tree. Flexible and fun, in my opinion.
Thoughts?