Doc unification would be definitely a good long/mid term goal, but I think for now the faster is going separate.
In fact, unless someone is volunteer to do it in the unified repo, I will go separate since I have been asked to look at that part of the hosting. And if I am the one doing the job, I am going to do the faster so we will not be blocked on it.
And yes, I do think for now that classic Fedora is more polished and more mature than Silverblue, and the doc/website should reflect that. The tooling of classic is more mature (just the speed of the mirrors from Europe), the people in LUG doing support know how to fix things (while I did spent 3h to make my system boot after removing 1 swap partition, and fixing Linux is my daily job since years), the number of software properly packaged is bigger (in Gnome software, cause no rpm are show, and I am sure this would confuse users). That are all problem that will be fixed, I have no doubt on that. But until that’s ready for regular users, we should push them to think that yum/dnf-rpm is the proper way.
Now yes, we should always keep in mind the unification and I will keep that in mind, make sure that moving is painless, make sure we do not duplicate too much things, make sure we can transition, etc, etc.