I wish instead of having to finish the whole entire quest-line which automatically unlocks level 10 of the skill line, you got the skill line in the beginning and gradually leveled up throughout the quests.
I find it annoying you have to complete ALL the quests to unlock everything at once. It doesn't make it enjoyable being forced to do everything to get nothing in return until the end. I feel that if you got the skill-line unlocked in the beginning and doing quests slowly leveled you up would be more enjoyable. They do that for all the other guild skills like Undaunted, Fighters guild, and Mage Guild.
Imperial DK tank
Imperial Warden tank
Imperial Templar tank