Arcane Healer: A wizard with access to healing magic. Completely steps on the niche of the Life Cleric (to include copying some of its features), which is a major turnoff.
Familiar Adept: A wizard with a more powerful bond to their familiar. I like the concept, and this is definitely the best of the three, but it still steps a bit on the Pact of the Chain warlock's niche.
Generalist: A wizard that gets access to some non-wizard spells and gradually sheds the class's restrictions. Too powerful compared to the other wizard subclasses, especially as they get to higher levels.