One of my friends mentioned to post suggestion here. Is this forum like Steam community forum too?
I will write video description here too. Thanks.

"The player should have control over their reactions is the thought behind this video."
Lately, I was reading a lot about reactions but not many ideas though.
No, I do not like pop-up & freeze the entire screen while projectiles coming at player.
The idea to perform auto attack with toggle is not that good either.

'Reaction turn' might provide much more freedom to choose skills ( when there are multiple reactions to choose) along with immersion.
Players do not mind spending time as long as it is their turn. lol

If players do not want to take reactions, they can skip reaction turn.
Successful weapon atk by Paladin must activate 'Smite' skill on player's hotbar. And the choice to use smite should be left to player.
Larian can also use 'shared reaction' hotbar for party to make things easy.
Good luck.