sevenbastard
Legend
Agreed.Depending on how far you want to go, just eliminate caster classes (or just full caster) / subclasses and then offer a few new non-magic classes. I don't see any need to rebalance existing ones. If you want a low-magic you just have few classes. I mean there is reason the One Ring doesn't a dozen classes w/ 4 subclasses each. You can pretty much do low magic out of the box simply by eliminate caster classes. The game works just fine without them.
PS - I want to be clear that I too am In favor of a specifically low/no-magic setting guide.
I made an extensive Sword and Sorcery/ Darksun ish (without psionics) house rule for 5.14e that used only Fighter, Barbarian, Rogue, and Wizard. Then limited the sub classes available for the first 3.
I also did homebrew for all the species in that world.
Currently 5.24e has a lot less subclass that rely on magic so I haven't updated it.
Now what it really needs is a spelless ranger...