I'm not sure how I feel about these particular buffs, but I'm not averse to the general idea. It would be nice to consider the ARPG system of adding random modifiers to create occasion surprise 'champion' mobs just to keep dungeons feeling fresh and slightly randomized each time. Nothing too chaotic, at least not on the normal dungeon runs. Even just things like 'enemy splits into 3 when killed' or 'immune to stun' and similar modifiers would be very interesting. I was kind of hoping for this with PoTD, actually.