I was taking about 31 damage per shot as Kuzmann last night from an R&R, so 3 shots and I'm still standing. Iune kept popping her head with Wisdom which was about the only person that could handle her, since they nerfed Kuzmann's direct ray damage and there weren't many enemies spawning to arc from. We had a terrible Hans that never seemed to use jetpack and brought Warm, but I KNOW Hans can handle R&R. Konstantin would also Shred Alicia, but our team was just not suited to handle her very well with only 1 spike damage character and the most mobile one not using his mobility.
Some shots randomly still seemed to deal higher damage, they running theory is that the bounce is causing single shots to hit twice, kinda like the Schleuder can on bosses or if you hit the right angle/bounce. The R&R should definitely not be able to deal double damage with a shot, and that sounds, again, like a bug rather than how the weapon should be working. Bugs should be fixed, but if you are not considering it's a bug and want it nerfed into the dirt just because you feel it's difficult to fight against, that's not helpful to the character as a whole. All of Alicia's other guns are basically shit. Novera is garbage, Eager is garbage, Daisy is only situationally good and not a good "gun", R&R is like her only good shooting weapon. Her other guns all need buffs, imo.
If there's one upgrade that makes R&R particularly dangerous, it's dynamic, since it was never considered broken before due to slow shot speed and slow reload. If they switched Dynamic for like Treasure Hunter (because Alicia currently has NO guns with 2 reward upgrades) and added a bit more reload/fire rate to the base stats, that would seem fair. She was honestly more dangeous wounded than in the air, since her shots all came at whoever was going towards her for a finisher (because Hans wouldn't friggin jetpack!)