I like this idea this idea, but to see it truly be interesting would require more benefits to custom races. Apart from custom CF banking in order to get useful ops or more research, or custom attacker races (for the same reason), the standard races have built in specialties that a custom race can’t compete with. Camaar has speed, Partaxian gets the magic boost + OH, Revalon has +10% income, Quantam research advantage as well as a variety of ops, and Wardancers get to be laughably bad. The cap on custom stats hinders the variety that could be used.
Maybe remove the cap on stats, but make each 10% over 50% cost double the rp. Theoretically someone could have a race with 160% attack bonus, but negative everything else and no ops or droids