You left out one important item on your list of items that shouldn't come back: the switchhook. I just thought that was a terrible replacement for the hookshot, which was an excellent item. I would like to see the 'buddy system' brought back, though. I'm talking about the last two dungeons in WW before Ganon's Tower, when you have to go through the dungeon with Makar or Medli. It was a new gimmick, that is kinda neat. I would only want it in one or maybe two dungeons, though, cuz it would get anoying if you had to do it a lot. The Roc's feather I can live without. It's become a staple of the GB Zeldas, but the console Zeldas are perfectly fine without jumping.
BTW, I like the Twinrova theory. That boss has got to be one of the best made in the Zelda series. I will never get tired of fighting her/them. I can see a storyline in WW2 where Link learns that Twinrova is trying to free Ganondorf once more. It becomes a race to see who can get to the Master Sword first, but naturally, Link has to find a way back to Hyrule, sending him on his new epic quest. Ah, what a game that would be.
I think that the multiple tunics will come back too. But didn't we already get the Megaton Hammer back? The Skull Hammer was just as good IMO.