I played the entire game on nightmare and with a rule of no healing, but for some reason I was so tired that I just said fuck it and decided to finish quick the origins of life fight, since I couldn't grind to fight him and I found that he was way too tanky, I decided to use all the healing items that I never touched.
Now, about the ending It was incredible bittersweet, Dana's story already made it clear that no matter what you will never have a 100% happy ending with her, but it was still sad to see all castaway village forget about her, at least the true ending gave some closure to her, but I'm still sad that pretty much all eternians dissapeared. That being said, the ending was awesome, I really felt sad when I had to leave Seiren Island, since I knew that I will never see the other villagers again. Falcom really managed to make a powerful ending, which is a big contrast to memories of celceta where after finishing you pretty much forgot about everyone on that game
By the way, has Falcom ever explained how many gods are in the world? like, does Maia know Feena, Reah or Eldeel? or is a thing where each region has its own god?
With Ys it's not so much there are a bunch of gods but more that there are ancient civilizations. Ys 8 is some actual god territory stuff doubly so with the world getting fucking retconned :P