Hi 
When I quietened my BC down with very few barks in the ring - I lost all the speed.  Gave him back his bark & at 9 1/2 he is still as fast as he ever was.  My BC goes feral - just feral if my handling is off.  He really tells me off, where, where are you trying to navigate me to - show me!!!! 
My older dog retired last year at 12 1/2.  He stopped barking & that told me he was only doing it because I asked him to do it. 
So barking versus no barking in the ring..... IMHO if the dog is a natural barker with excitement, that is what you have.  My third dog does not bark in the ring and I have to say, what a joy she is to run... she just puts up with my bad handling. 
I think my pup is going to be a barker.  Oh no, but I think true. 
But you know, none of my dogs bark in the obedience ring.