Paul Farquhar
Legend
The issue is, if you throw out 90% of the rulebook, it's not 5e at all, is it? It's more of a reskin, like The One Ring or Esper Genesis.We* don't normally, but we have and it could be done. We only have one caster in my current group. If people understand from the get go of the setting that X, Y, & Z class/subclasses are not available or changed in some way, I don't see why it would be an issue (other than for sales).
I make it four subclasses in the core rules, and something like another four in expansions.Yes, depending on what you are going for those could be banned too. There are still more than enough non-magic using classes & subclasses (I made a list in another thread not to long ago).
I wouldn't call "everyone has a little bit of magic" low magic. I would say "no more than one party member has any magic whatsoever" would qualify.Now, personally I think you could do low magic easily with 1/3 casters.
I wouldn't call The Witcher low magic. The place is stiff with bloody sorceresses!I think that works really well for a Witcher type setting.