For Super to be truly great and connect with all the fans it simply needs to do one thing. It needs to make Piccolo the third strongest character. I think putting him in the spotlight again with Goku and Vegeta adds the diversity and badass levels that the show is missing when he's not one of the main fighters. I'm aware that he's not everyone's favorite character, but his inclusion would add a lot of what fan's are asking for in a new Dragon Ball series.
- The show can finally be about someone besides the Saiyans again. Even if we can't level the human characters up (which is BS) we can at least have someone a part of the main cast who's not a Saiyan.
- Adds diversity to the technique pool used by the protagonists. Having Goku and Vegeta spam the same types of beams with the same neon blue hair is sure to get stale after a while. Just having him in there to throw some SBC and Hellzone Grenades and even maybe that never before seen HEAVY GRENADE :-P could add a lot to the action.
- His intelligence will be wasted if he's stuck in universe 7 while Goku and Vegeta go off to other universes. He's definitely the brains of the Z fighters and Goku and Vegeta can use that tactical mind on their journey.
- We never got to see a Piccolo vs. Vegeta fight when they were at comparable levels. Having this fight now may generate more interest than Goku vs. Vegeta.
- Piccolo, Goku, Vegeta, and Tien exemplify the spirit of the show more than any other character. They are the true warriors who never stop striving to reach the next level. A show centering around Goku, Vegeta, and Piccolo takes all the best elements of the action side of DB. These guys are always down for a fight and still dream of challenging Goku.
- Any arc with Piccolo, Goku, and Vegeta as the strongest were generally the best. Think about the best arcs of DBZ. From the Saiyan Saga, to the Frieza Saga, to the Cell Saga, all of these arcs had Piccolo, Goku, and Vegeta featured prominently as the protagonists (or antagonists) and made for some of the most compelling action.
- There are a ton of Piccolo fans and he's still at the top of the character polls despite his new underwhelming role.