Tony Vargas
Legend
The (re)action economy seems a little stingy that way, yeah.You could say the exact same thing about anything else that costs a reaction, e.g. hitting someone who turns their back on you to turn away.
Sure. Maybe if there's a plausible defensive reaction, like dropping prone to avoid some of the damage of an AE, you can expend your reaction to gain your proficiency bonus to the save?Maybe just making a save would not have a cost,but for a cost you could get a bonus to your saving throw .
Classes that already have proficiency in the save are just so good at such tricks that they don't need to spend the Reaction.