Since the expansion rolled out I have leveled one team to 85 and have done quite a few normal dungeons, no heroics yet, except for some trash mobs to get a feel for how hard thrash are hitting in heroics.
My current state of mind is to make gold for the next month or so from farming and transmutes. I have a druid which is half way through level 83 without doing any questing and another druid I intend to use to farm when he gets a little higher (currently lvl 63 from boosting him to lvl 61 when I had RAF and now just farming with him).
To me there is no point in banging my head into the brick wall which heroics seem to be. In my opinion the time taken to gear a team to be heroic viable is wasted time due to the same team in 6 months time will roll through the heorics when they have been nerfed and the next tier of gear is released and justice points will be actually worth something (I view the jump in gear from a regular lvl 85 dungeon to Justice point gear too small to be worth farming).

For me by the time I had a team geared enough to do heroics the next major patch will have dropped and all that work would be wasted. Instead I am focusing on farming mats which now levels toons for me as I watch tv and leveling up some lowbie teams.

I am personally looking forward to 4.1 when at that point I am hoping the orbs are no longer soulbound which will make all my current professions useful again without having each toon heroic viable.