Things like mob stealth detect (when applicable) seems to work, but the enemy spell/ability window is usually entirely blank. It occasionally will detect a spell from an enemy but when it does it then displays that spell for every other enemy in the dungeon.

Enemy spells for MoP challenge mode dungeons is not currently a focus of development. The MoP challenge mode support was made possible mainly by an open source contribution from @Wotuu #664

I will leave this issue open for now in case a community member would like to add the missing data.