No, just no. The only good way to have easy/hard modes is if the mechanics are different enough otherwise you just bore your raiders (hi Blizzard, yawn) and if you do that then either you're in CM waters or you are already designing what is basically a new boss. Personally I feel raids should build up in difficulty, like they used to in the TBC days (same as heroic dungeons did then, or GW2 fractals).If you started out as a new raiding guild during TBC you started with Karazahn/Gruul/Maggy, then SSC/TK then went to ZA (not sure if ZA was harder or easier, it was a 10man tho, while most other raids were 25), then Mount Hyjal, then BT and then Sunwell Plateau and you'd probably go through them in that order (if for no other reason than that raid atunement was a thing and you weren't even getting into most of those without doing at least some of the previous ones)Not sure where I'd fit the TBC world bosses (like Doomlord Kazzak) in there (unlike the GW2 ones they weren't exactly killable without a competent organized raid guild) Atunements were removed due to complaining since some people couldn't manage them, but given how they mostly required you to kill the previous tier end boss they then went and complained some more when they couldn't get through the new raids (shocker, if you couldn't get through the previous ones, which were easier), then during WotLK they devalued older raids by giving away the previous raid tier gear through dungeon tokens and when that still proved to be too much effort for many they implemented LFR and copy-pasted mechanics on "normal" and "heroic" modes and in the process burned out and killed most of the raiding scene (there were of course other factors here as well, but this is still one of the big ones). So no, different difficulties for the same boss are a terrible idea. It's still the same boss, they're still the same mechanics. CM's are fine (that's what Ulduar basically had), but easy/hard mode like WoW currently has is just a very big no.