For the OP as such : I believe Sven mentioned it was just a temporary implementation.
As for the need for a pop-up dialog, I know a warning is a real issue in many similar games (i.e. Pathfinder: Kingmaker, Solasta, etc.).
Because too many new players do terrible mistakes that can cause needless defeat and frustration, games à la D&D and Pathfinder add a warning tool-tip or pop-up, at least for the first times. I presume BG3 will find a way to teach the concept to players both being at risk of AOO and about the Reactions your character can do.
Last edited by Baraz; 19/08/20 11:38 PM.