What if South Park's voice acting was done by Actual VAs?

[TMC]

In fairness, to Matt Parker and Trey Stone, a good portion of South Park's "charm" is that many of the voices aren't done by professionals but by themselves. Granted, they still used "professionals" for the key female parts like April Stewart, Eilza Schnider, Mona Marshall and the late Mary Kay Bergman. But even so, let's say hypothetically instead Matt and Trey doing many of the voices they had for instance:

• Grey Griffin - Stan Marsh, Bebe Stevens, Bradley Biggle
  
  Tara Strong - Kyle Broflovski, Scott Malkinson
  
  Jennifer Hale - Eric Cartman, Kenny McKormick
  
  Dee Bradley Baker - Butters Stotch, Timmy Burch, Gerald Broflovski
  
  Nolan North - Clyde Donovan, PC Principal, Phillip, Stephen Stotch, Dr. Alphonse Mephesto
  
  Steven Blum - Craig Tucker, Stuart McCormick, Ned Gerblanski
  
  Jeff Bennett - Tweek Tweak, Randy Marsh, Officer Barbrady, Terrance, Dr. Gouache, Father Maxi
  
  Jim Cummings - Mr. Garrison, Mr. Mackey, Jimbo Kern
  
  Phil LaMaar - Token Black, Jimmy Vulmer
  
  Sean Schemmell - Sergeant Harrison Yates

[king of comedy]

This is interesting and would change the show a lot. But in a good way. I'd love to see the same for Family Guy.