Sure there is,
at least on low levels , you can always see someone making deadmines on low levels or hellfire ramparts...
There are not many high end raids yet, if any , cause realm just went wotlk and there is no lvl 80 at all yet , maybe someone hits it while i m writing.
But the cool thing about the absence of RDF is that nobody cannot level by sitting in capital and queueing RDF all the time.
There is alot of world pvp going on, and crowds of people are really in every location.
Scripting is also very well done, i am level 30 , did about 250 quests and maybe 1 was bugged , so that quest npc's pet did too much damage.
Anyway, back to your question, there is pve on all levels, despite of the fact that RDF is disabled.