Well next year is Daisy's 25th anniversary, although I don't expect them to do anything about it.
As far as linearity vs exploration there's room for both, and I actually expect this to get a better balance than the previous games. Galaxy felt pretty linear outside of some of the larger levels...which I actually didn't mind, but maybe felt too linear at times, possibly cause it could be contrasted directly with some of the few big levels. My hope with 3D World is that there's more big levels with more crap to do while still being linear, like that
2-1 level looks decently sized enough to look around for stuff without being wide open and devoid (and I didn't know the coin block head was in there).
Aesthetically I think the main issue is just that it's all really geometric vs Galaxy having a lot of more organic looking landforms. We haven't seen much of 3D World yet so who knows if everything is like that or mixed up...I could see it sticking with the geometric style just cause it's probably easier to platform on, like everything is clearly defined as a result.
And while looking at videos this one caught my eye, nothing special about it but I thought Peach's animations looked awesome/hilarious, particularly the running
and when she pops out of the vertical pipes(edit-and fire flower Peach has different
hair!):
http://www.youtube.com/watch?v=OsYY0KtfgRM