I haven't seen any of the 10-12 level 11-14 accounts that were almost always on Ilum since the chest spawn nerf there.
I hit up the chests with my level 20ish toons for quick credits every so often and since the mass nerf I can hit the plant and usually loot 2-3 of the 4 chest for either side and it not be camped. I think Bioware did something right finally

I even camped one of the chest post nerf and the haul was about 2/3- 1/2 what I was getting before but had no issues with any one else. Then again Ilum on my server seems to have less numbers over all. That could be a bad sign on the whole.