I don't know. People getting annoyed over change i.e. sprite babies?
Ice puzzles and strength puzzles are the only things that really require grid movement (although I think ice puzzles could work in 3D without feeling too awkward). Everything else is easily transitionable. And the 3DS has this circle pad thing. It would make sense.
Yup, talking about things that use steps to keep track of stuff. I guess you could be right.
Colliseum's way was pretty shit.
Ah, so you mean like the friendship/egg stuff. I couldn't imagine that'd be very hard to reprogram.