Just call them a Mage? Not Magus, just "Mage". Arcanist is already taken up by the way from a class that is basically on the same prinicipal as this (spontaneously casting prepared spells with class features that makes you not want to multiclass out)

This class... I honestly thought was cool at first, but I do honestly feel it is a little gamebreaking

Reserve feats are nice, for instance, but I don't think many people use them much in the first place. But I don't see it as particularly strong option, especially since you have so many spells, even with the dropped casting progressions. You still get up to about 3 spells per level, before factoring Cha bonuses. It'll be one less than wizard, you just trade out 1 spell per level for not having to get a spell book. I'd probably make it more costly to cast spells personally.

Can't speak for familiars, since I rarely have people bring one.

Spontaneous metamagic is nice.