Now, now - I don't mean they're a bad class or anything like that, they're great. However when they were launched , they remained OP for way too long, so now developers are scared to do anything remotely similar . DH hasn't topped the charts since it released , yet it's already being nerfed . Hell even in GW2 HoT - they launched Revenants in good shape-ish, but very soon after that they began nerfing them for pretty much a year. So yeah , this is why we can't have nice things - Death Knights !
P.S.
Don't take this too seriously , it's late and I'm bored