I admit that it’s been decades since I saw the original CAMELOT. Having seen and enjoyed the current revival, I do not recall all the magic in the original that has now been removed.
The only significant magic I found missing was the iconic performances of the original leads and the fabulous original sets and costumes.
Are you referring to the spell that kept Arthur away from the castle on that fateful night? Or the explanation of how he pulled the sword from the stone? Or how Merlin disappeared?