I'm not sure if this should be in the "bugs" section or if it was an intentional change, so I'm bringing it here to discussion.
Stamina Regeneration has recently been recovering 30% of stamina.
Even on the wiki, stamina regeneration skills show 30% recovery.
However, in-game it shows as 20%.
I don't recall seeing any official updates about a change to the effect of stamina regeneration.
At first I though this was exclusively for Hydratila as yet another way to counter Thetys.
But this appears to apply to every monster (that I've tested at least).
In a way this is cool because now even someone like Caillech can counter Thetys by starting the game off with Cold Blood (team stamina regeneration) before an enemy Thetys uses Stamina Devourers. 41 stamina is more than enough to use just about any skill.
In a way this makes all stamina drain skills a little less effective. As long as you have regeneration on, you won't have to fear being denied from a 100% stamina drain.
This also makes our extra turn friends (Voltaik, Zlya, Volray, Rhodent) more powerful, as they will be able to attack more.
So was is intentional? A mistake? Testing? Maybe this is a part of the balance changes SP mentioned?
Thoughts, concerns, debates, answers welcomed!