CreamCloud0
Hero
If Magic Initiate was officially rewritten to allow any caster to cast their MI spell with their own spell slots in addition to 'once per day/LR' then i think there should be a different bonus caveat for pure martials as the feat greatly favours the classes who already have access to magic which is a little bit backwards in my mind, perhaps something like: 'if your character does not have spell slots of thier own to cast the spell with they are instead allowed to cast it an additional number of times equal to the ability modifier of their ability score they use to cast the spell (potentially capped by proficiency bonus?)'