I'm all for reinforcing open play with additional rewards/influence - without crippling solo ofc. However, some mechanics - like the bounty system as stated above - should change to fit into the online gameplay.
I agree. Missions, goals which you can only complete with other players would be nice. Like a dungeon in an MMO-RPG.
Make seperate goals for open and group/solo.
This way solo players can still fully contribute (which isn't a problem since it's solo on both sides) and open players can have a chance for the "top 5%" since they only compete with their kind.