An excellent idea to prevent everyone from creating new servers left and right. Maybe now we can agree to use only one :D
But ONE thing is an absolute no go in my opinion.... Putting one of the MAIN features of Discord behind a Paywall! I mean, to get better audio quality I now need a lot of people pay for this o.O Then I can switch to a hosted mumble or Teamspeak server instead, and only one person have to pay it.
So I think this is a terrible idea. The rest of the Perks are high balanced and things that make a server more fun to use for everyone.