The dub season began with Enter Elesa, Electrifying Gym Leader!.
Let's pretend that the dub season will end with the Homika episodes so that the third season beings with BW2. So far (up to the current japanese episodes) These are how many times the rivals have shown up.
Georgia: 5 (Including Tesseed Research Institute! Iris and Baivanilla!!)
Personally I am conflicted of how Trip has been portrayed. I love the fact that Trip isn't beating everyone and winning everything and has been shown to be the rookie that he really is. Although they have been making him a little too pathetic.
Bianca, Stephan, and Georgia, I'm content with. Bianca has shown considerable growth and has been mellowed out a little bit. Stephan won both the Tower thing and the Clubsplosion (Donamite). Although I wish he could see something other than Zebstrika and Sawk. Georgia is fine. I love the fact that she pushes Iris to become stronger and be a Dragon Master... something that she is slaking on.
Burgundy... oh Burgundy... she is the joke. She was even the first human to go blasting off. That just shows how much of a butt monkey she is now. She's the old Team Rocket. I would like it if she became a B-Rank Connaisseuse. She would rival Cilan a little more closely, as we all know he needs a challenge nowadays.