ok. The ones that could have a major impact on how your character's build works are: - Dex-to-damage is replaced by a feat which increases your critical threat range with weapons finessable with the normal weapon finesse feat (+1 at 15 dex, +2 at 17, doesn't grow any more than that, stacks with but it not doubled by it). Gives about the same dpr as dex-to-damage, if you're willing to be a little MAD, but I think it's more unique and thematically fitting. - if a magus gets medium armour proficiency as a feat before he gets the magus class feature, when he gets the class feature he instead gets heavy armour proficiency. I'm not really worried about you being too powerful, being good at combat can only get you so far.