Its not about randoms keeping up, because by definition, most randoms are less active and thus will never be able, and should not be able to keep up.
I think this round is actually an example of how it could work. The more randoms that fill up a gal, the less chance you can just go noobroiding them. And the more bad priv gals disband, the more 'experienced' players can help the random gals along.
Chances are you'll always have someone experienced end up in your gal, and with 19-20 ppl atleast some will come on IRC