I'm in a very casual guild that clears normal raid easily but struggles in hc. We're currently 5/10.
Killing only a few bosses means most people get no loot.
Meanwhile those people easily do m+9-11 and prefer to farm the dungeons, ending with 2-3 ilvl 220 choices from the Great Vault.
Even Great Vault hc raid choices are weak compared to that.
It just makes people put less effort into doing the raid.
But can you blame them?
We've outgeared normal and just clearing it with alts. Nobody wants to go there with their main.
Get good? Hardly needed, we don't care about WoW as much.
Bring back those damn tokens that let us do extra rolls!