Instant deed monsters. Do allegedly bugged monsters improve on HC, or detract from it? Things like tomb vipers, nm fele, old msle. How about loading screen deaths from Durry back in the day? Yeah they're buggy, and if coded correctly likely wouldn't be nearly as threating, but does that mean they're a bad thing? You can still build/play correctly to avoid dying to them, and without them what would there be left to worry about? Do you want to see threats like these in D3? Preferably without the buggyness, but still with the same danger level.