Yes sure would be nice to play an elemental build how it is supposed to be.
-- Yet, I bet they forget to implement Impact in the correct way.
The obvious Iceblock bug aside, Impact right now only works on direct Fire Dmg Spells
--> meaning Fireball, Pyro, Scorch, (Flamestrike??), fireblast.
--> It is also supposed to procc on Ignite and the correlating Dots from Fireball & Pyro.
Makes a huge differance in how valuable the talent really is.
So please Nostalrius look into this in more detail.
(Maybe someone post that on the bugtracker - i forgot my name there
)