[Autumn]

Currently when you increase your aptitude through a modifier of somehow (Vamp shell OC, Upgrade, etc.) then your scaled APT won't increase at all(meaning you can't just get a free +1 by statting right), I think that's fairly balanced.

However when your APT is decreased by some source, then your Scaled APT will also go down, making you lose more stats than you should, I think this should change and it should work both ways, where in that when your Aptitude cannot be decreased or increased at all.

Sources that decrease APT include:
Installing a youkai (This is such a pain to deal with, if you can please fix this.)
Being struck by vamp shell Overcharge
Being hit by Goose Bite


And these are the only things that have all stat modifiers to effect APT like that, that I know of, at least.