TL;DR: I changed it so that the experience needed for story points at max levels isn't doubled over what you need for story points while levelling.
Spoiler
In vanilla, you get 4 story points per level. Using a few examples to illustrate what I'll be saying: in vanilla, going from level 9 to level 10 takes 1,000,000 experience, so you get 1 experience point every 250,000 experience while at level 9. Going from level 14 to level 15 takes 2,000,000 experience, so you get 1 experience point every 500,000 experience while at level 14. However, once you hit level 15, XP_REQUIRED_FOR_STORY_POINT_GAIN_AT_MAX_LEVEL_MULT takes over, and multiplies that 2,000,000 experience to 4,000,000 experience, so, at level cap of 15, you need 1,000,000 experience points per story point, and it stays that way no matter how many story points you get.
In this mod, the standard variants at least, I've altered the levelling curve such that to reach max level (20, 25, 30, or 40 depending on the variant) it takes around 4,000,000 experience, and I've set the XP_REQUIRED_FOR_STORY_POINT_GAIN_AT_MAX_LEVEL_MULT to 1, so that, at max level, that 4,000,000 experience required per 4 story points remains 4,000,000 experience points, meaning that, exactly like in vanilla, it still takes 1,000,000 experience points per story point. The rapid variants have a slightly different set-up, and you only get 2 story points per level at max level, but you get double the bonus experience from using them, and each level only takes half as much experience, meaning that you still have the same overall rate of story point gain--1,000,000 experience per story point at or near max level. You actually get slightly more experience points with this mod, due to the fact it smoothly transitions up to 1,000,000 experience points per story point, as opposed to jumping immediately from 500,000 to 1,000,000.
If you need more clarification on any this, I'd be happy to explain. It's relatively simple, anyone could have made this mod, I was just the first person to make one public for 0.95. I figured that since I made the mod for myself, I could save other likeminded people the time and effort if I uploaded it where everyone could use it. That's also why there are so many different options--it saves someone else some time, and didn't take me all that much as I'd figured out a 'formula' for it.