We expect the latter, although the current UI has gone through a few iterations on this as we’ve rolled out different Proofgrade functionality.
We do not plan to, as any guidance is likely to mislead the user into thinking they will have a positive experience. In our testing, we found that material variation is so great as to render recommendations unhelpful, and that there is no advice we can give to ensure people have a simple and wonderful experience with their own materials. Using your own material with a Glowforge will be much like using your own material with a conventional laser - you’ll need to develop your own expertise.
We’re working on ways to facilitate user-to-user assistance for materials that you source from other companies.