Make 4 families, 20 players each. Coz either way only two (max three) fams are competing each round, others are just farm. And i don't see fams interested in fighting for 3rd or 4th spot. It is either win or nothing now.
The problem might be one fam outinfraing others, but then other three can have fight for 2nd spot and maybe wnner catching up with extra planets
And i would like to see how current leaders could manage big fams. I can see some separate teams creating inside... should be fun 
Because the small changes or adjustments you do every round, is like trying to keep alive someone, who is in coma. The fact is, there is just not enough people to make it work well.
One sunny day i will call on you.. and then Shadows will come down on your cozy abode.. it will happens.. be ready