Few things that need to be said, imo.
1-MC is harder than LFR, not mechanically but simply from how much damage mobs and bosses can do. I think an accurate analysis would be that the damage from bosses and mobs is closer to heroic and even mythic when under-geared, but the mechanics are basically LFR. Screwing up hurts, but not screwing up is pretty darn simple.
2-Vanilla raiding is designed around 25-30 players. The game was never intended to have the super tightly tuned difficulties of today, and I suspect blizzard thought that most guilds would have trouble fielding even 20+ players for each raid due to population and lack of knowledge back in the day.
3-The current patch not only has classes in a far stronger state, but has some nerfs to MC bosses and far better itemization not to mention the limited debuff slots change. Vanilla never actually existed in a state where MC was the endgame content and this easy. Again it was never hard, but we are being given rocket launchers in a raid intended to be conquered with slingshots.
I’m a Bear tank for example, and we are arguably BETTER tanks when initially stepping into MC than Warriors. During this phase of actual vanilla though, Druid tanks as well as many other specs were complete garbage at the time. All Druid specs were garbage actually.
1h weapons were far weaker and actually needed an eventual rework. Fury warriors shouldn’t actually be the gods that they are.
Paladins were buff bots with average
healing early on, not buff bots with godly healing like they currently are.
I understand their hesitation to change anything, but ironically enough…they changed everything. Like I said, the game NEVER existed in a state where MC/Ony were the endgame raids with this kind of itemization, class tuning as well as boss nerfs. Would MC be hard if things were in an accurate, early vanilla state? No, we are far better and more knowledgeable. Would it be the pushover that it currently is? Na, it would have taken people longer to be properly geared and setup.
So yes, I wish they tuned it up to account for the current patch we play on. 50%ish more health, 15% more tank damage, 30% more raid/mechanical damage (Shaz arcane, Magmadar Fire etc.) as I feel it would have given us a more authentic experience.
I would LOVE to see BWL come out and have it be buffed. It’s not until AQ that we will be on a “level playing-field” because AQ was designed for us to walk in with rocket launchers. BWL will be a lot tougher than MC, but we’re still bringing rocket launchers to a gunfight. It will be a bit much for casual players, but players you would consider “Okay” will be able to clear it in a reasonable amount of time.
I understand their hesitation though, but I still hold out hope that BWL will be tuned to account for said differences (it won’t).