fuck that, they've truly failed if suddenly the only way to dps on a DK is as a pet class. The pet isn't a hassle to control or anything, but it's not what many people enjoy about DKs. They don't have to change anything but make Frost 'good' once in a while. One spec is always going to be better. or make UH better at single target but have anemic cleave or something, that's how it was in Dragon Soul - UH was the 'good' spec, but frost was superior for progression on the two last bosses due to how the spec functioned. That was a good judge of who actually knew their class.
Maybe you'd have a point if it were a rep 'grind' but...what are you grinding? There's literally nothing to grind. It's gated, but it's not grindy in the least. You complain an awful lot about truly trivial shit, to be perfectly honest. For example:
Sorry? If you can't learn anything from failure, you're destined to fail again. It's just like the treasure room in throne of thunder - a scenario that involves actual skill and adaptation and that you can improve at every time you do it. Or you can watch a guide or something, but that's on you. Does the spy guy suck the first time? absolutely, but he's easily handled also, it's a scenario that rewards critical thinking and observation. If you could spam it, that would probably diminish how much learning you bothered to do instead of just bashing your face into it (also, THEN it would actually be a grind, but since you can't, it's not).