I loved the original game. Put hundreds of hours into it and got all the achievements. It's one of my favorite multiplayer experiences ever.
I'm really disappointed by what I've played so far of the new game. The modes, maps, movement, mechanics, etc. are all a pretty massive step down from what was previously a near-perfect game. The fast, fluid, and frantic gameplay of the original seems to of been abandoned. I'm really confused and bummed out by the choices they've made. This just went from my most anticipated game of the year to considering cancelling my pre-order. :/