Okay, I correct myself - logic is completely irrelevant. However, although the way I see the wizard now is just the way I've been taught to see it in years of older editions, computer RPG's and fantasy books, I think that departing completely from some of it's most basic concepts is departing from a big part of D&D as we know it.
Maybe I'll come up with something more detailed, but what I'd like to see is:
- No at will abilities, as I think it's ridiculous that "we wanted the wizard to have something interesting to do when he's run out of spells, so we just made it so he never runs out!" At the least, there should be a concentration/constitution check and penalties for severe failures as the wizard tries to exert himself beyond his limit.
- Some spells could become per-encounter, some remain per-day, based on their effects, naturally, and explained by how strenuous they are to cast.
- Some form of preparation must remain, as someone proposed in an earlier reply a wizard could make some form of hastened preparation between encounters.
- Spellbooks need to stay as they are, maybe with simplified mechanics for editing them.
- Wish needs to remain per-year.
