Pick those who didn't read the article before commenting... :p.
1. They are talking about properly introducing and enforcing that only the captain can talk to the Ref. Not to mention that one of the specific areas the blue card is for is ... enforcing the showing of proper respect for the ref...
Same things it is for today, with the exception of the very specific areas where the blue card is introduced. To give examples, Dunk's straight red for being verbal with a Ref might have been "only" a blue if this new rule existed. The other area blues are being suggested is for deliberate fouls...