I played Darksiders 1 through the week before DS2 and a few things have caught my ire.
In Darksiders 1 every time you hit something, you got a very satisfying slashing or thumping sound, yeah it could get a little annoying in prolonged battles but you knew for certain you were hitting an enemy. The sound of a blade cutting through air is not enough when the hit numbers can appear behind the camera and obstacles.
The platforming in Darksiders 2 has certainly evolved but the detection of whats happening is gotten a lot worse. War could grab pretty much most platforms, getting out of this habit was difficult at first, but I adapted. Fighting Bheithir on the other hand... The game could never tell when I wanted to just hang on the ledge (which are predetermined ledges specifically for hanging!), it would throw me off everytime and I would reappear in the lava spew I was so desperately trying to avoid.
Another platforming problem I had was in The Scar, the part where you hookshot between sinking platforms, at one point I let go but Death would not grab on the ledge and fell, forcing me to restart from the beginning, and when I got to the end I jumped from the very edge of the last platform, hit where I was intending to go but kinda physicsed/dipped my tippy toe into the lava and had to start again... Very frustrating as the hookshot from DS1 would hook to anything it could so long as it was in range.
In comparison to Darksiders 1, there is very little combat. In DS1 I could walk down a huge corridoor and encounter more than my fair share of enemies. In DS2 I find myself crossing huge maps and half of the dungeons wondering where all the enemies are, there was a scene where I am in an elevator with a friendly NPC riding for a minute or two and there is nothing happening on screen bar the elevator travelling up.
The lip sync is not the only thing missing/not as well done as the original game.
Its a small detail, but they need whoever left to come back or find someone better.
Crosshairs, again a small complaint, but they are waaaaaay off. As someone who likes to fuck around and make their own games, it was difficult for me to get my first crosshair aligned right, but shouldn't be a problem for these guys. Here's what I'm talking about:
I quite like the game so far but I think its a far cry from the original Darksiders in terms of the type of game, the quality of the systems and the story.