I think I'll withhold judgment until I can try playing the games myself. Change is not always a bad thing; in my opinion, many of the cosmetic changes in B/W were very well done, including the 3D environment (feel free to shoot me for the blasphemous words). Of course, change is not always good; I didn't feel that the Pokemon were terribly original or true to the spirit of the game (I mean, a limited number of objects-that-are-Pokemon are understandable to a degree, but chandeliers? Trash bags?).
To use another game as an example, one of the greatest (in my opinion) part of Fire Emblem were the support conversations between characters, which could be quite long and often gave the playable characters significant depth in their relationships with each other, their personalities, and their history. They changed that in the Wii game, Radiant Dawn, and to me, that quite damaged the value of the game. Bad change, but there were other interesting changes that were neither bad nor good, and a few that were good.
A game that re-uses the same formula over and over becomes stale and uninteresting, essentially the same game packaged in different wrapping. I think it's great that they're trying to innovate and make use of Nintendo's 3DS features. I think Kunoichi probably pinned the right word for my feelings as well - I find myself intrigued, and interested in seeing what else the game will be offering.