i agree with sheikahsage. i dont think we need a magic meter. they are outdated, boring and are the kind of thing that will hold future zeldas back

that is why i think magic should take on a new role within the gameplay
it can be part of puzzles and all kinds of things

also id want an unobtrisive way of using magic and showing magic level (if it was shown)
like somehow through the partner character
i think a good partner character would be the perfect tool for using magic
and they and their magic could be part of all kinds of puzzles

also, i assume that the partner would be upgraded over the course of the game