First off, I think one of the best ideas they could do is to create an All-Stars in which the public gets to vote on who returns - the 11-14 teams with the highest votes would return. That way we wouldn't have teams that people hate on the race (like John & Jessica or country singers in TAR 24. Not saying I don't like them, but most people would agree that a lot of other teams should be in their place).
Also, I think it'd be cool to have a redemption season in which all the teams got eliminated early (legs 1-4). If this were ever to happen, I'd want it to be this:
-Kim & Leslie (10th in TAR 1. Very Jaime-and-Cara-esque)
-Brandon & Adam (8th in TAR 23. Obvious reasons)
-Amy & Daniel (10th in TAR 21. They had a very unfortunate elimination)
-Misa & Maiya (11th in TAR 20. Another unfortunate elimination)
-Connor & Jonathan (9th in TAR 17. Awesome guys)
-Brad & Victoria (9th in TAR 14. The always lovable old couple)
-Lena & Kristy (9th in TAR 6. Hay bales.....)
-Jim & Marsha (9th in TAR 5. I loved these guys, and every time I rewatch their elimination I cringe)
-Shola & Doyin (8th in TAR 2. They were awesome. Too bad they got lost)
-Andie & Jenna (10th in TAR 17. ANother team who deserve to make it farther)
-Rob & Amber (8th in TAR 11. Everyone seems to like them. I don't know why, but I'll go with it
)