I'm please that there are backtracking now.
I was really disappointed by Twilight Princess's dungeons.
They almost used ONLY the found weapon or item in THAT dungeon, it's like the old items were useless...
I never used the wind boomerang again after the forest dungeon
So, this time I think it's great that we will have to use more than one item per dungeon (being backtracking or not)
Ps: though, I didn't like the DS games where you had to go back always to the same dungeon, and doing always the same floors again and again :/
Those where not backtracking, but replaying
And I'm also curious about the weapon upgrading system.