Don't hide your light under a bushel. You're doing great work here, you have a good eye for colors. :)
The problem with ICFTD would simply be: if there are new things drawn, or even just shadings changed everything adjusted for the old palette would be messed up. In color hacking you are limited to change the color value, you do not change where each shade is used. So when redrawing it might be very different combinations of colors from the palette on the assets.

