Since the gap from crippling to masochistic is too severe for me, I'd like to set up an intermediate difficulty by applying racial penalties to my race. Two possibilities I see are:
Modify the custom race .xml file. Can I use negative values in there? ie would -20 in, say, social production give me a 20% *penalty*?
(I think) a slightly more convenient alternative would be to create some new "nerf" racial abilities...0 point abilities you could pick before the game starts like any other racial ability that give various racial penalties. Two questions on this...is "0" a valid entry for the "optionxcost"? Do negative numbers for the ability modifiers work here?