Originally Posted by
Nahela
The main problem is the mechanical checks go from 0 to 100 between boss 3 and boss 4. Realistically, most guilds stuck at 3/10 are struggling to field that 20th reliable player. Until you dramatically overgear something (which, in this day, is a much longer trek than it used to be), most Mythic boss pulls are over with a singular failure. When one person's concentration lapses for 1 second, that attempt is over for 20 people.
This in itself isn't a bad thing, but the issue continues to be that there's no ramp up. The first 3 bosses are supremely easy, Chronomatic has the only real coordination check and it's easy to simply overpower that with numbers. Trilliax has coordination-based wipe mechanics, but the boss is beatable with mistakes. Krosus basically isn't, though others might be now with the nerfs. It's the same cliff we've seen in most raids since WoD.
The game just isn't designed to teach players to be better. Nighthold comes closer than previous tiers in that every boss gets a new mechanic with each difficult. That by itself is a huge improvement over previous tiers, but unfortunately there's still a enormous gap between bosses of the same difficulty level. LFR makes it almost literally impossible to wipe and Normal is way undertuned, so the number of new raiders coming into Heroic and Mythic is dramatically low. Either someone's a good player to start or they simply don't have the content available to improve. A lot of guilds are getting stonewalled in Heroic this tier because the jump from Normal to Heroic is insane.
TL;DR - It's overtuned, but not for the reasons people think it is. Raw numbers are only helping the top 1% (or fewer) and have almost no effect on everyone else, which is why so many are getting stuck.