It is glorious. As in better than dualstrike for single target, better than reave for multi target.
Something else of note, increased AoE radius seems to affect the visual representation of offshoot projectiles not at all, but I think the hitboxing is still changed. AoE radius also affects the area in which they land. I'm playing MS with cascade on crit, and when it lands, whoa. I think I might try out EE with it too.
Full concept post another time, seeing as I made pretty much every decision for this character on a whim. Oh hey, there's a new skill I get as reward, let's see how this goes. Mmm, shiny. Ah, I have enough crit chance to go CoC, let's do that 20 levels earlier than planned with a different skill than planned. Etc.
Oh, and RIP my summoner. I know better than to stand around chatting in docks with mobs on screen not dead yet. Except apparently I don't. So I'll finish testing on SC. One good thing coming of it, I have a Torment on SC and it really does work much better with it.