Devs are apparently leaning towards eliminating OMM missions in october. You can see threads here and here that discuss it. A decision is not final yet, so, if you feel strongly about it one way or another, it would be good to weigh in.
IMO, this would be a serious mistake. As some of you probably vaguely remember, I took a long break from EQ, probably two and a half years. I recently returned on a whim, and started playing seriously again. A few friends came back with me and we've basically progressed from being tacvi geared level 75-78's with 1-1.8kaa to being convorteum geared 85's with over 2kaa.
The thing that drew us back in was OMM's - they did three important things. They gave us a gearing path that, while not good in comparison with underfoot gear, was a lot better than what we were wearing and was (in conjunction with boomerangs) good enough for us to start progressing through underfoot. They gave us an AA boost, and although we could've done fine without it, it certainly didn't suck.
And, at least as importantly as the first two - they gave us fun. When I came back trying to tank even field of scale was painful - it was doable with caution and patience, but it wasn't fun. It didn't have any of that spark, that rush, that EQ used to hold for us. OMM's did. They let us fill a dynamic and often challenging role in a group environment not handicapped by our lack of gear. They reminded us of what we used to love about EQ long enough for us to establish ourselves in the group game well enough to find that same thing in non-MM zones. If OMM's weren't around, we would not have stayed when we came back, but because they were, we've stayed and progressed through all of underfoot.