What a brilliant idea!
It really annoyed me how successful simplistic match-3 games like Candy Crush have gotten, and yet the rather similar and yet way deeper Tetris Attack/Panel de Pon/Puzzle League style seems to be completely forgotten (seriously, I haven´t even found a single decent Tetris Attack clone on Android, only two really shitty ones).
P&D seems to have a skill element very similar to Tetris Attack. The reason I never could get into P&D is that I really don´t enjoy the presentation at all (it´s just very... gaudy) and even though many say that you don´t NEED to buy IAP stuff, I just really want to have the feeling of having the "complete game". I also don´t really care for this intense synthesis stuff, rerolling, stat maxing, whatever - I already have Disgaea for when I feel like some spreadsheet gaming.
The "dragging while pushing" mechanic looks really intriguing. Having it on the 3DS with a nice Mario coat on top might just make this game become my personal Tetris Attack of the new generation. And I´m not even the biggest Mario fan, either, but the general upbeat style is just perfect for a puzzle game.