It seems these little chests have been forgotten when it comes to re-itemizing the entire game. I had already long since burned through my DC maps, but was saving the ones in pact and dominion zones until a good time. Today seemed a good time as any, so I pulled one out and went hunting.
Only to confirm my suspicions - the rewards from these chests, supposed to be something special to help new players, is anything but... all you get is about 2, blue-quality, traitless pieces of armor (I believe they're meant to be specific to build, so that's nice, but it's no help if the armor itself is worthless except to deconstruct).
I know this affects very few people, but still... these are now significantly less valuable than normal treasure maps, which almost always give a set item or two with the new changes. At this point it's hardly worth for me to go hunting for the chests.
It would be nice if the loot list for these was updated to closer match the rest of tamriel, instead of remaining forgotten.