I'm of the mind that we're in a really good place individually, but that other classes are overpowered. I like the glass cannon feel; that I can pump out tons of damage and have to be on top of my defensives. I'm pretty pleased with the options open to us (Unholy, 2H Frost, DW Frost, Desecrated Earth, Remorseless Winter, Runic Corruption, Blood Tap, etc), and I think Blizzard did a pretty good job. Unholy could use some QoL buffs, definitely, but overall I'd say I'm as happy as I've ever been with where we are as a class.
The issue is that balanced isn't enough this season. This season, you need to be overpowered. Why bring a DK instead of a warrior? Their AoE CCs, plural, CCs, are instant and reliable. Ours is more to fob people off and make them use GCDs on things other than damage or healing. I love that, but why bring it instead of instant AoE lockdowns? There's no reason to. This is just one of many reasons that a warrior beats out a DK for PvP right now.
IMO, if we buff DKs any more, we're gonna have another issue as with warriors. The answer isn't to tone us up, it's to tone everyone else down. At least, that's what I believe. I want to get a bead on everyone else's opinion.