No it was a very good idea, the community did not have the tools to do anything better. And it worked because it was small and all of us entered the correct Cat. No one was cruising because we all went for the win no matter what.
But time has come for a better system and we need Zwift to help with that.
Even if Zwift only auto assign race categories it would solve 90% of all the frustration.
@DanielS: You can look at people in Zwiftpower they are ranked at one lavel but keep racing in lower levels. (ie B cat racing in C or C cat racing in D)