Who's permanently changed? If you mean the Philosophy Professor, he should be a man again after you go to dinner, unless I missed an if statement somewhere. Permanent changes will be coming in the future, just not yet. And with Lydia if you mean the first time you get her pregnant, where she's pissed off, yeah it'll say she's not pregnant again because she'll take a plan b pill to prevent it. Technically it shouldn't say she's pregnant to begin with afterwards, but it is what it is lol. But if you paid to impregnate her with the green light, or you impregnated her while she was bimbofied, those should both still work even at the end of the latest update. There should even be a little added dialogue when she makes you wear a condom if you have sex with her on the last night.
I guess I could add little exp values next to the spells on the sidebar and then let you see the hidden number next to the girl stats. In terms of how spells level up though, that's very consistent, it's just based on the strength of the spell you're casting. So using a minor/shy spell is worth 5, moderate/humming 10, major/dancing 20, and then unstable/mastered 40. The experience required to reach each level grows though, so that's why it takes longer/more powerful spells later on to grow. But yeah, I'll add that as well.