RTF is a global modification that replaces all towns in the game.

I agree, it would be better to give the "all-knowing" spellcasting ability to the Elementals, and return the "absolute defense" to the Dwarves - especially since there is no "mechanical" connection between these perks and racial skills (I'm talking about a connection like the one between the "arrow shower" perk and the "avenger" skill - one doesn't work without the other).