Really? I haven't actively done anything in the game, but the way you're saying it that pretty much seals the deal for any other class barring Vit Dekans(well, Int Dekans have a DD ignoring skill too so yeah) to ever kill Guards or Defender. I say that's pretty ****ed up and destroys the game in it's own way.
Templars could've easily fixed a long time ago, but the game is broken beyond repair so you might as well introduce players with 100% DD.