Crimson Longinus
Legend
You're the one who has invented "re-grip" action. There is no such thing. There is nothing that indicates that moving one hand to or from the hilt of the weapon is any sort of action at all. And they literally errated the rule to make it even more clear.You get one free object interaction, not two. Either use it to interact with the sword by inventing a rule to "re-grip" it or to interact with your spellcasting focus for the somatic/material component. the only way to interact with both is to drop one or do it on different turns because you can't have a focus in your hand while holding a two handed weapon with two hands.
And by your logic you cannot multi attack with bows. Do you really think that is the intent?