Cyraxpt: Good question, i used to play it with a friend but since his laptop video card got fried that i haven't played (7 months ago i think). From i was checking on the forum it seems that the vehicles release is near (maybe next patch), i have to check the game again to see if they improved the combat.
I wish I could help you out there, but I played the game for the first time in January this year, so I don't know how the combat has evolved. What I can say is that I find it extremely satisfying to kill a zombie either in melee combat or with a gun. What is fairly recent, I think, is the ability to knock down zombies which makes it easier to take them out:
https://www.youtube.com/watch?v=vZfCVjqF8qM&feature=player_detailpage#t=699Firebrand9: I played it when it was first announced, back when the only way to buy it was Desura. It's good. A fun game. The newer builds seemed to drift away from the retro aesthetic I liked in the early versions.
I imagine you are talking about the new 3D models for your character and the zombies? I think I also like the old 2D models a bit more, not really sure, but it appears as if the game is highly moddable so hopefully people will create mods with custom character and zombie models. I'm pretty sure I saw one where you could make your character look like Ironman