I don't think they changed the combat since the VGX and E3 2013 trailers. At least, not for worst. What I do think happened is that these two trailers captured very specific moments in the game where everything just "clicked" with the animations. Also, they stand out because Geralt is moving from one enemy to another, without pause, so the battle has a real nice pace to it.
The recent gameplay footage didn't help recreate these moments because the player demonstrating was stretching out the battles with a hit-and-"roll" TW2 gamestyle. Also, the camera is zoomed out in comparison to the two short trailers, so it's much more difficult to catch the nuances in Geralt's movements (shame! really hope we can zoom in).
I rewatched the battles.
37 minute gameplay
- Drowners.
- Harpies.
- Swamp bandits.
- Wildlife before werewolf.
- In the werewolf battle there wasn't really a chance, because the wolves came one at a time.
- Endregas defending the tree spirit.
Not sure how to phrase this, so apologies if it's not clear. Not in any of these group battles did the player "jump" from one enemy to another in immediate fashion as was shown in the two short trailers. He always focused on one, chopped away, and quickly jumped back to get some distance from an enemy who was closing in. There were many opportunities for the player to continue quickly to another attacker at his side or back, and somehow recreate those cool moments in VGX \ E3 2013.
I don't want to discuss his tactics. That's not the point. Could be that it was the right way to go for a smooth presentation limited inn time and not focused solely on combat. Still, this defensive and cautious gamestyle makes combat feel lackluster.
Near release, there was a long gameplay footage of Shadow of Mordor, played on the highest difficulty, with just the purpose of seeing Talion running around. Moreover, the player demonstrating wasn't exactly careful. He jumped straight into the thick of things. Whether it's smart or not isn't the point - it allowed them to show really fast-paced fighting scenes where the enemies were really pushing him back, and he barely had a moment to rest. That was cool to watch, and I'm hoping we'll get something similar.