This is the main reason I'm switching to ranged DPS, not the N'zoth fight, but yeah.
Melee is past due now, they feel antiquated af in these raids, especially some of the less mobile ones like Frost DK. On Frost DK, some of the fights you can't even DPS properly, you have to practically play the game differently than everyone else and setup as if you were in arena, except you're on a boss, it's so FUBAR and you have to be a certain type of player to find that fun in PVE.
You can tell Blizzard is aware of it with the mobility Covenant abilities, but I'm sorry, they're bandaids. Unless you just plan on giving all melee a teleport, I don't see me DPSing on a melee ever again, unless it's really cushioned against mobility BS, like Subtlety or something.
I'd rather play a busted, nerfed ass fire mage, any spec of Warlock or anything at this point for raid dps purposes.