Raiding in TBC was fine. Raiding in WOTLK was fine. There are ways to motivate hardcore players. Hard-Modes anyone? Mimiron... do not press that button.
And frankly spoken who the fuck cares about hardcore raider...0.x % of players. All known guilds disbanded anyways. So wayne? This game was never intendes to be for hardcore players.
Make 2 difficulties. 1 between HC and Mythic... harder to the end. And 1 Storymode with significantly worse loot.
Nobody needs normal. Nobody needs LFR. And nobody needs 4 difficulties.
We had fun raiding in TBC and WOTLK...much more than we had in the later expansions.
WOD had 1 fun raid, the first one. Because there we had no fucking scaling issues and the imperator was hard but doable... everything afterwards was plain bullshit. Hell you heal Archimonde Mythic with 2 Healer... this is even easier than Garrosh after final nerf.
Every noob and his mom (if they have a guild) can kill every Mythic boss because of this scaling crap (Set boni, trinkets, ilvl boost).