I agree with many things said here,
My personal points are Add a Platinum threat, Keep no threat segregation, AND, Never!... I mean ABSOLUTELY NEVER! Should a Bronce or lower player be put in a Match where a Gold players is present. NEVER.
I as medium Gold Player myself can only agree that the Bronce/new Player/ etcetera... Will get nothing enjoyable out of it, he will only get killed over and over. Thats no fun, is it?
And the present Gold player will complain about the bronce being useless.
Just dont let Golds play with bronces(or lower)