What do you prefer to grind currency like valor in dungeons?
Current heroics: Pulling half instance, most mechanics are ignored, AOE fests, etc.
Using scaling technology: Dangerous to pull many mobs at once, targeting and CC may be neccesary, some bosses may have one-shot mechanics.
To avoid burnouts, only the first dungeon of they day would award the currency so you don't have to run dungeons all day