Prior to getting behind the wheel of 2nd Edition, my experience with implementing ‘reactions’ centered around the skill check. Diplomacy (and later Persuasion), was the centerpiece of NPC good will or antipathy. Generally, this almost never took the form of a ‘called check’ by the DM based on player actions, but was instead a player-requested check: “Can I roll Diplomacy to make this guy tell us where the MacGuffin is?” This playstyle is the exact thing that the OSR, in all its various iterations, has been scrambling away from for 20 years.
If you’ve played any modern version of D&D, you’ve seen that moment where the face character botches the Persuasion check and the player dutifully acts out the resulting buffoonery. Plenty of laughs have been had here, though it’s always bothered me that charismatic PC would randomly turn into a social moron every once in a while. Even if not taken to that extreme, the player-facing results leave little room for nuance in the roleplay: the failed check is a failed check, and the party is apt to focus on the die result and its repercussions, rather than the NPC in front of them.
Charisma has become king in social interactions; a party’s ability to win friends and influence people isn’t based on their actions or their reputation, but on the high score of whichever player didn’t dump Charisma. Obviously, Charisma should have a place in social matters, as that’s basically all it’s there for, but it shouldn’t be the end-all-be-all of whether NPCs have a positive or negative reaction to your collection of murder hobos.
2nd Edition has been a breath of fresh air. First, it keeps the reaction of the NPCs and monsters behind the screen; the players need to assess the social situation on its own terms, based on information communicated by the DM. Second, the face character can’t just spam the Charisma button; players need to determine how they’re going to approach any particular group, and hope that their bonuses from Charisma, their reputation, and their choices will carry the day.
That’s all to say, I like Reaction rolls. It’s good stuff. To figure out how it’ll look in a 2e rework, let’s look at the rules.