I know, but it'd be an amazing way to taunt enemies during a battle.
guillotine - buzzsaw - ground pound - switch to Void Sword - *HUUUUUUURK* - stab disgusted and appalled vampire.
As for the chandelier platforming, it looks like Gabe is doing the plank-balancing thing on top of them. If you look closely, you can see some have one board, and some have two so you can go in four directions. It's way snappier, anyway, which is really good. I wonder how much freedom you have to jump from a spot you're tethered to, though.
Also of note is that the demoing guy shows you can fall from the higher-up places to the ground and not have to re-spawn or take fall damage. That's good, because this annoyed the piss out of me in the first two games. (And the N64 games, actually.)