The smallest moons are not to scale, as they'd be smaller than a pixel. Also the wiki says Minmus has a radius of 60 km. That being said, I'm very excited about how varied the solar system (kerbolar system?) is becoming. Each planet/moon has its own challenge. Moho's day side will be ship burning hot, Eve's thick atmosphere makes landing very easy (parachutes) but ascent very tricky, Jool will have a big gravity well but interesting moons in its orbit, etc. I wish I could play it right now. Or rather not, as I wouldn't get any work done at all.