It's not about just "ripping off Solasta", it's just that Solasta did the core ruleset implementation far better and more true to the letter than Larian did, even though Larian claimed they did all they could to have a super faithful implementation, which is clearly not the case. If they were to change the way reactions are handled and be inspired by the way Solasta did it, that would be awesome. I don't WANT them to be another Solasta, since frankly BG3 is far better in so damn many ways in my opinion. But sometimes it's worth taking a look at how others did things and improve upon one's own product.