I thought he had just said the myths came from before the Romulans arrived on Romulus.
I really enjoyed the finale, I thought it did a good job of giving resolving things. I can't think of any major issues I had with it or anything left unresolved, I was really shocked how tightly everything was tied up. Since they went into this knowing they were getting another season, I was expecting a cliffhanger, or at least a hook for next season.
My biggest disappointment was that they revealed Data was sort of alive, and then killed him off at the end of the episode, but it was a nice way to give Picard a bit of closure on Data. At least Alton Soong is still around, so we can potentially get more appearances by Brent Spiner.
I loved Riker showing up with the Starfeelt ships, we already knew he was aware of what was going on, so it wasn't totally out of the blue. I think having another TNG character show up might have felt like nothing but fan service, but since Riker already had an established role here, it worked.
The Romulan fleet fighting off the orchids was a pretty cool action scene, and I loved Picard and Jurati using the Picard Manuever.
I was not at all surprised Picard ended up in the golem, I figured it was going to be either him or Data. I do like how they had them set it up to age and die the same as Picard would have if he didn't have the brain abnormality. That was a nice way to give them any easy out if something happens to Patrick Stewart and he can't keep doing the show.