chitzk0i
Explorer
They tried the temporary hit points thing with the artificer and I think it makes an interesting change of pace.One possibility is to invest temporary hit points. Another is to grant regeneration. Another possibility is to provide DR as an interrupt reaction.
As for the DR, I think you mean immediate interrupt. It sounds cool, though.
I was hoping for something radical, something along the lines of Avenger's Oaths to demonstrate that the Leader role can result in different modes of play.
Although check out the whole avenger AC thing. They recently nerfed Avenger AC and are giving them more tools for damage to compensate. Basically, avengers were a little too radical.