Well so far, every time a new trailer gets around we see more stuff and more moves. I'm a person who likes the original stuff that are like the game's signature moves being kept in some form or other, so since we already have Air Hike, Stinger, Million Stab etc, I'm kinda ok. New stuff are great as long as they don't try to MAKE you use them no matter what.
For example, I'll share my experience in Assassin's Creed. In Assassin's Creed Brotherhood, a new weapon is introduced. The Crossbow. I love Crossbows and all, so I was very eager to get it, and loved using it throughout the game. The game didn't make me buy it. It was purely optional. And that's ok.
In Assassin's Creed Revelations however, the bombs are introduced, with a HUGE variety of them, and they try to make you use them ALL the time. I dislike bombs. They make noise, they are easy to get you mixed up in the explosion and other stuff like that that make me not like them. Not in ACR, I mean in general AND ACR as well. So yeah, when the game WANTED me to use the bombs all these times in story assassinations/infiltrations in order to reach the next place (not talking about the full sychronization thing mind you) I was really ticked off.
Same thing will probably happen if they keep the DT in DmC as an air-only move. I don't particularly dislike fighting in the air, but I love fighting in the ground. But if they take away one of my favorite features like DT, and tell me "only available as long as you stay airborne" then yes, I'll be annoyed. If Angel Trigger or somethings replaces the feature of the old DT, then I'll have no problem at all, but the way things stand...