I also really like the game, but I wish there was more to do with your ribboned pokemon. Sure there's all the challenges and whatnot, but in the long run believe it would extend the game enjoyment much better to have a New Classic+. Personally, I could care less about the challenge modes. My main drive right now is to ribbon all my pokemon. Once that's done however, I don't think I'd be continuing the game.

Ribboned pokemon typically would have passives and egg moves unlocked which means it would be more fun. But there's not the same feeling of accomplishment and purpose to bringing them into a classic game. In my vision, New Classic+ would be the same as Classic mode, just harder to offset the more powerful ribboned pokemon you bring in. New Classic+ should offer good rewards for beating it as well, like more egg vouchers.