I Main DRK and know several people who play both WAR/DRK at a high level of skill -- both are viable. I think the changes have made them harder to play in the "aggressive" style as in the past but I'd hardly call leveling one a lost cause. As a mid-tier/filthy casual I honestly don't think DRK is any worse, just had to make adjustments to thinks like using TP and a few nerfs that I had to work around. I hear they're buffing enmity next patch so that should open us back up to doing dps again. Just my two cents.