I like this one. Storm Drake already seems to do a fair amount of damage, but currently lacks any other sort of utility that would make bringing him (her?) along worthwhile. I think the stuns on the blue take care of that and also open up more rune options (well, basically just makes CDR good).
Random dumb question - pretend Yeti's electro debuff is applied to an enemy. Storm Drake hits the enemy with greased lightining (bonus dmg from yeti is applied) which applies the storm-charged debuff as well. When Drake then whites, does the Yeti bonus dmg get applied to both the Tornado Alley damage and the storm-charged damage? Essentially, does Yeti's buff apply twice on that interaction or only once?
This one seems kind of meh to me, but really only because tanks don't seem to have much of a place in the current meta. I do not think the amount of damage she deals (or not getting staggered) will change this.
This seems really good. My complaint with heroes like Wyrm and Banshee is that during their white they seem rather useless. And yea, I get that their white skills have a team-wide effect but it never seemed good enough to merit their inclusion (because you are essentially fighing 4v5 while they are channeling their white). The geyser would take care of that complaint and the magic vamp would make wyrm virtually unkillable.
Looking at the proposed Wyrm change makes me think he would almost be a must-have in FP and GW again since timeouts count as a victory for the defender there.
Also, random Water Wyrm question - his purple skill can reach 100% attack and move speed reduction. What happens when a foe is hit with that at 100%? Are they effectively stunned?
So, high level thoughts or TLDR:
Drake - seems good
Cutie - meh
Wyrm - seems really good