i agree with everything and i'd add more skills for Stamina builds.

I'm a Stam. DK with 15-16k dps and i dont realy know how to improve my dps, i use 3 class skills, the rest is from weapons, guilds and Alliance War and it's Sad

I would improve the dot from Eruption because it's REALY low atm
i realy like the WHip stamina version but i'd add at least an other skill for damage and a couple ad buffs

One usefull skill would be, for example, a flame Armor that burns Stamina or Magicka while dealing X damage per second based on the Stat that is burning + gives +X% miss chance to the enemy (because of the blinding fire)