I think you’re right, yeah.

Yes. It is TROS ascendant from Hal 9000s.
As cool as it is a stable lightsaber for Rey, (even cooler when Ben gets it, so it became full circle. The Skywalker saber and stable like Kylo saber, it’s like it was made for him) I still prefer DOTF version of Rey with her wielding a double bladed blue saber. Logical move considering the saber was split in two in TLJ and Rey knows how to fight with a staff. It would be way cooler if it was like dark Rey’s saber. Double, swiss and unstable. I would also make one side of it be normal blue and other cyan blue.