Just played my first rematch in ranked, I beat a Chun 2-0. It really threw me off at first cause I was like "what the hell is this?". Then I finally remembered about the 2/3 thing. Funny thing is that I immediately ran into him again and won the 3rd match. This time I declined because I wanted to fight different people. The points will probably start racking up much faster though. That guy had nearly as much LP as me so I got 110 from him in probably just a 5 minute span.
This is great. Less time waiting/loading for matches and more time on the actual match itself!