If this used to work, but now doesn't, try to get older version of UABE.
Back when I was into modding of this piece of crap, I was going to write my own utility, inject it into POE and the utility would intercept any ability that's being loaded from assets, and swap it out with my own stuff. And my own stuff would be in simple json.
You could write this hack if you're seriously going to mod the game.
I loved modding it. It's too bad I can't do it commercially (because nobody would pay for this). Otherwise I'd take out all the flaws introduced by Sawyer, such as abstractionism in stats and skills (bring it closer to D&D), and also cut out megabytes of superfluous text. Too bad I don't like the game enough to do it on my own time, and nobody would finance this.