Not much to add except what the title says above. Hyper Thalamus on the map "Brain Teaser" in "Beneath Tcotzac" didn't play a single hurricane against my team of two warriors and one priest, leaving both teams just kinda sitting opposite of each other somewhat awkwardly. Fortunately, he was kind enough to teleport one of my guys to the VP islands, so I can only guess that he's just tired of getting the grey matter beaten out of him.
Already reported: http://forums.cardhunter.com/threads/hyper-thalamus-wont-use-hurricane-3-36.7514/#post-92242
It seems that something changed in the AI behavior regarding Hurricane after the EttSC update. Other players have reported same findings: http://forums.cardhunter.com/threads/hyper-thalamus-wont-use-hurricane-3-36.7514/ but we've yet to hear from the devs @Jon, @Farbs or @Flaxative.
Whoa. Guess I was lucky, worked fine for me following the expansion release. :X Though I did have to wait 3 rounds before he started doing it, but then he kept it up fine on following rounds. All I did was move my units as close to the edge of the platform (as close as possible to the mobs). Just as a makeshift fix, did you try something like that? Maybe there's a way to trigger it?