Every person is going to be a different, a number of multiboxers cleared every heroic 1-2 months ago and as said there really isn't much to do beyond that except farm, and that gets boring after a while. I sat in awe of Niley & ss2 while they had every heroic cleared over 2 months ago while I was still struggling with caverns of time, now my guys are all geared in full t7/t7.5 and have 200+ badges each and 10k+ gold and I haven't run a heroic in over 2 weeks. Of course, I'm having fun just leveling a deathknight now, its a lot more fun doing 70-80 with only one guy doing quests than it is trying to do 5 collection quests at once. And I like to raid on my main, so I have something interesting to look forward to in 3.1, but for the non-raiders I think 3.1 is going to be very boring after 3-4 weeks, which is sad I have no desire to level my 2nd (3d, etc) teams to 80, its a lot of work to go from 70-80 and end of the day the differences between tank classes, melee classes, caster classes, and healers is not that huge.

Even if they had put in a new 5 man though it wouldn't have lasted that long, maybe an extra 2-3 weeks to farm it out totally. I'd guess in patch 3.1.5 or whatever, a few months down the road, they let you turn in heroism emblems for conquest badges, so at least 5-manners will have some form of gear upgrade path.