Yeah, the threads since implementation have revolved around folks asking for the other unimplemented reactions to be added to the system. They even wanted Sneak Attack to be added to the system. I see no reason why the other reactions shouldn't be added, if folks don't want to be prompted they can uncheck Ask.

As far as presentation, I had to hunt around to find the menu. Having the default be Ask would go a long way to make the system's existence obvious to the player. The player could then arrange the system to their own specifications.