As usual manga and s2 finale spoilers.
I personally liked the finale. Emma did not lose her memories, Isabella did not die etc. Though I do prefer that the creators should make a s3. The storyline can be about how they changed the demon world . The war between the demons and Mujika's coronation etc. I hope they can brink the goldy pond arc back and do some minute changes. In the s3 finale they can show adult ray telling these stories to two or three kids who happen to be Norman and Emma's children.( I AM A NOREMMA SHIPPER ).
Maybe in the future they can sow that Mujika is dead and the new promise made by Emma is broken. So they can again show a war between demons and humans. For Noremma shippers the creators can include the kids in the war. Maybe bring back the goldy pond arc too.
Maybe make the first part as s3 and second part as s4.Doing some minute alterations of course.
Also I think William Minerva anime version is what norman would have looked like if Manga version was animated. And people did u see phil and others. Isabella was playing guitar. Dude I want an OST of that.