It would be great if we could get a system that was conditionally based.
“Kill target structure at location” [Kill X in X]
“Kill enemies of corporation” [Kill X of X]
add an additional option “if addition station, or enemies killed, bonus x isk per station, per unit”.
A contract to kill a certain structure would likely be a fairly easy thing to put together.
Killing enemies of a certain corporation could be very easily gamed however. That is probably best handled using good old chat channels or in-game mail.
Missions handed out by players and carried out against players.
I’m not sure we need a dedicated framework for this given that you can just talk to other players to arrange such things already, but I do find the idea intriguing.