Sad part is, I love the Nimbus missions otherwise, but the fact that it's non-instanced is frankly a huge disappointment.
I do understand that promoting team-play can be good. But an environment like Nimbus promotes the exact opposite. The other players in the area becomes competitors for the limited resources in the area. It promotes kill-stealing or sitting around waiting for respawns. It becomes plain painful.
Also, it's opposite of what I've always loved about STO. You take your team, your friends, your boffs, or whatever strikes your fancy, and go do a mission in an instance. At your own pace.