I think the changes were necessary given the new direction that Zelda is taking, but there's still a lot we don't know about those systems (namely how vendors and dungeons will work). I hope there are limits on how much food you can carry and that you can assign food to a shortcut in the final game (highly likely, D-pad down had no use in the demo). I won't miss the rng element on health at least...
With Rupees I don't think it changes much but they did mention that they would be used quite differently this time around - you convert items found into Rupees somehow. Although, there was 1 Blue Rupee in the E3 Demo that a few people found.
Each time I start looking up stuff on the game I find out new things, such as this...
UFO..., and
things falling from sky, there's something interesting
on death mountain, and the things you can do with the physics engine, e.g. setup and use a
see-saw catapult.
Did anyone else get Tokyo Mirage Sessions #FE?, wasn't sure how i'd feel about the heavy Japanese cultural themes and such (not massively into anime stuff), but I'm hooked. It seems like solid JRPG so far, its fun and feels very complete/polished. After playing SMT IV on 3DS and now this, I think i'm an Atlus fan... even more interested in Persona5 now (didn't play 4).