When the majority of the player-side consists of morons that don't watch videos or listen to explanations, then yes... it is a way to go.
No its not, the way to go is to let people learn the mechanics.
People have had learning curves in most aspects of this game, even WotLK. In ToC people had to learn to move out of Gormok's fire asap or they'd die, people had to learn to not stand close to each other on KT in Naxx, in Ulduar people had to learn to do the Freya fight (DON"T STEP ON BOMBS!), in ICC people needed to learn the Proff P encounter.
These things take time, people will learn and those who don't will enjoy wiping in heroics and clearing regular dungeons all expansion.
Blizzard's job is not to cater to us, its to give us a product that we'll enjoy for years to come. They've given us that product, the issue is people want to clear everything immediately... it took more than a day to level from 1-85, its going to take more than a day to learn all of the boss fights in the game too.