First I want to say the game is absolutely wonderful, and even in early access it's already among my most played games ever.
With that out of the way I want to add a suggestion for the reaction system and I guess this is a good place for that. however I'm sure that whatever Larian eventually decide on will work great.
So here's the Idea:
when an enemy does something that can trigger a reaction from you, you have a grace window of let's say 0.5s,
during which you can press a reaction key (spacebar seems like a good fit).
When you press the reaction key you either:
-Take a reaction if you only have one reaction turned on for that scenario (basically how it works at the moment, just activated by player input).
-A pop up shows up that asks you which reaction to take.
I'd be happy to hear your thoughts.
I can see players spamming the key and reacting to the wrong thing...
Not my wish but a better implementation would display a popup with a series of reactin button and 5 sec progress bar to trigger rather than key smashing