With the points you get on the DOFF missions, you don't even have to play the game to get to level 50 in a couple weeks. I've got a toon that I played long enough to get into the DOFF system, and then just rotate assignments once or twice a day when i log into the others. Max level, never left the Sirius system. My max level Klingon character has only run the KDF-specific missions (there's what, 9-10 total?).
The DOFF system is kinda fun, but they shouldnt be giving so many points. There are so few missions in the regular system, you should at least have to play all of them to reach the cap.
I was heavy in the DOFF system on Tribble. Got a Fed Tac to VA with just two missions and the rest DOFF points. Got the KDF char to VA with no missions (except talk to the transporter chief which is more of a tutorial).
I love the DOFF system but think that no or very litttle XP should be given. Most of the points should go to the different commendations. Heretic said that they have nerfed the
XP awards 5 times. However, it still needs to be trimmed down.