I agree that eyes of newt should probably go away and all casters should require a focus instead. In theory I like the 3 categories of components but it rarely actually comes up. Just say, "To cast a spell a character must be able to speak loudly, move freely and be holding their spellcasting focus."Take out the things that mostly don't matter, or beef those things up so there's a purpose to writing it on your character sheet.
For example, spell components. They're usually handwaved, unless the DM goes to great lengths to say "You can't cast spells right now". Either reduce them entirely to fluff or have class features or magic items or something that changes based on what components a spell has.