I whole heartedly agree with those saying do what is best for your local racing. And there's nothing wrong with national rules for a basis for local clubs.
As for 1c, I'm assuming you need adjustable timing ESCs . That would be my major problem with 1c. If this is intended for more moderate speeds, then blinky would be the way to go. I don't think speed is and issue with 2c, you can't get much slower than 2c / 25.5 motors.
Of course I have never run 1c and don't race on carpet, so maybe I'm just too old school....LOL