It’s not “accoding to Blizzard” an exploit. No where has blizzard said doing dungeons on reset is an exploit.
In the thread ACTIONS TAKEN TO ADDRESS EXPLOITATIVE GAMEPLAY
Literally the first thing said is…
Clearly they say an exploit is CHEATING. Fly hacking, speed hacking, clipping, automated gameplay etc…doing a lot of dungeons per day is not and to say otherwise is ridiculous.