My content creators are not happy with the Prismic preview experience. I was hoping that the page builder would improve things, but the live slice previews are so incredibly small! How are you even supposed to read the text on the slices as you edit them?
I wish Prismic had just gone with a full page preview in an iframe like other CMS use, so you can see the whole page changing live. At least give the live slice previews half the page real estate, and don't restrict the container size so much so there's more room to see everything. This is a tool, there should be plenty of room to spread out your work and visualize everything.
Also the fact that document relationships are not supported makes it almost useless to me. Nearly every slice on our page has some kind of CTA that relies on a document link.