1-3 levels diff average isn't a big difference. But yeah, of course levels don't mean everything, especially attack/def. They are helpful but not going to make the biggest difference in a fight.
This is something we already do, we generally don't moderate things that have to deal directly with our own clan, and if we do others are usually involved/asked for their opinion.
Not sure why every few months a topic is made to try to bring about a rivalry we dont care about, just for it to die down again because it revolves areound a clan wars event or two and is never taken from weekend to weekend smh.