Thanks for confirming Smeurer. I've been rebooting, restarting, plugging-unplugging the tablet etc. for the last hour, until I decided to remove (delete) my prefs - I already did it yesterday. It looks somehow they got corrupted overnight again, which is not new (they have the weird habit of corrupting and causing problems). The number of times I've had to delete the preferences to make my tablet work again is only surpassed by the number of times I've had to reinstall the driver itself.
So, I have pressure sensitivity again, at least in absoute mode. But still have to use 14.2.1 if I want relative mode + pressure sensitivity.
I'll make sure to join that party if we ever can throw it. I don't know it this is Adobe's fault, Wacom's or both, but I've reached my boiling point already. Every week there's some new problem with my tablet, I'm so fed up...
EDIT: some new info here.