CM and hc raids

Hey guys! Me and a few friends thought on starting on Frostwolf mainly doing some CM's and maybe do some 10mans. While leveling we got really discouraged becuase we where vitnessing a **** load of bugs from various sources like quests not working, loot in dungeons being broken and things like that. I'm wondering if the CM's are at all playable seeing the state of the early game one would suspect that endgame is better coded but who knows.... Also how's it with legendray quest chain and the lvl 90 raids? Also wondering about classmechanics, are classes blizzlike or is the meta scewed because of bad scripting?

CMs were just overhauled fixing the scaling. Only part of of the legendary quest is released, devlog says they finishing up the next part.