Can you tell me about the Merlin/Amber approach? I searched for it on this thread, but all I found were people telling you how mean you are to magic-users. And bards. You are very mean to bards.
I'm not mean to bards! I simply accurately categorize them as anathema to life and fun. A bard is the living embodiment of a co-worker saying, "Hot enuff for ya," for all of eternity.
The Amber solution (from @Wolfram stout )
So, for those wanting to limit magic in combat (but not get rid of it completely) I counter-propose The Amber Solution (2nd Amber series by Zelazny which focused on Corwin's son Merlin).
All spells are Rituals. Casters can complete a ritual except the last touches and "Hang" the spell. This reduces the casting time back to the casting time in the book, but Casters can only Hang a number of spells equal to their proficiency bonus plus if they have a familiar they can hang one spell on it.
This allows the caster to cast some spells in combat but not a lot. For me, it is a nice in-between step.
ETA- I call it the Merlin/Amber because this is from the Merlin, not Corwin, series.