There's a pretty fun interview with Wired with Daisy Ridley, and she answers a whole lot of questions— most of them about Daisy Ridley. I have attached the video below, it's worth watching in its entirety; Ridley is simply one of the most charming people on the planet right now, so have fun with it.
The biggest note, though, was from a question about her favorite duels in Star Wars. The following answer got me really fired up about Star Wars: The Rise of Skywalker:
"The interesting thing about this film is that we concentrate more on the fact that [the lightsabers] are light. Because the [old] lightsabers were so heavy, as Eunice said, who is our new stunt coordinator, that it was more like broadsword fighting, which isn't technically what it's supposed to be because lightsabers are supposed to be light, by nature. So they actually made the lightsabers lighter for us. We, in this film, have, perhaps one of the most epic fights in Star Wars."
Daisy Ridley also appeared on the Happy Sad Confused podcast, where she talked about an upcoming fight between Rey and Adam Driver's Kylo Ren:
"It's a great fight. I've become such a better fighter, and they made the lightsabers lighter, so it actually looks like we're swinging light and not heavy [swords]. This fight, it was November, we had water being thrown at us—I'm not gonna complain about the cold, I'm just not gonna do it (laughs)—so it was like a real thing of stamina. It felt really epic, and it felt epic even at the time. One can only imagine what it's gonna look like."
I never really gave much thought to how heavy the lightsabers were in the previous Star Wars movies, but it makes sense that the weight of the props would effect what the actors could do over time in their fight choreography. It will be interesting to see how these new, lighter-weight lightsabers effect the battles in Star Wars: The Rise of Skywalker when it hits theaters this December!