I echo Odeo's sentiment. Paper Mario has a fanbase that is fond of Mario RPGs- that's not exactly a massive, outspoken demographic (though judging by the comments in-episode, maybe it is), and I don't think it's one that would hurt the sales of the title, especially on Wii U, a system that was supposed to feature "games that satisfy the people who already own a Wii U". To put it bluntly, I'd rather see a Paper Mario that embraces the idea of just being an RPG- and like Guillame, having it be 25-ish hours (which is really the length of TTYD without it's mediocre sidequest system, I don't know what you guys are thinking) than a game that continues to attempt to alienate me.
However, we have discussed the brief trailers for this game extensively on the forums, and it may perhaps have some unplumbed depths to its combat system and focus on exploration, which would be fine with me. I'd rather it have an engaging combat system that at least doesn't revolve around consumable combat techniques than anything. The card system could be a repeat of that, but since cards aren't one-time use items in the real world, I can imagine a deck-based system instead, akin to BATEN KAITOS(?!). That might be a bit too hopeful, but it would be a drastic improvement from Sticker Star.