It's funny to me how people think encounters are tuned easier for whatever reason. The truth is, it's the addons and websites that killed raid difficulty. Want to know why vanilla bosses were hard? Pull a boss for the first time without researching tactics and log in using the default UI with no addons. I bet you wipe for a few extra weeks. Not to mention most of the vanilla bosses had maybe 3 mechanics in the entire fight, as opposed to the 20 they have now