Worms WMD really isn't THAT BAD. The problem with it is that it needed more development time as well as a closed beta with experienced Wormers.
I still play WMD frequently and have a lot of fun with it. I know that a lot of people here think that any Worms title post-WWP is complete trash but I disagree. I think there are good ideas in all of them. Team17's failure is recognizing what is good and not carrying it over to subsequent titles. They need to stop trying to reinvent the wheel and instead just make each game incrementally better, despite the inevitable bitching about how each new game isn't that much different from the last.
If they spent like 6-8 more months developing WMD with good feedback and effort it could smash W:A, honestly.
As far as the new game goes, I can only assume that it is going to be a 3D title, or 2.5D at best based upon the renders in that video. The noobs and casuals are dying for another 3D Worms title. I know this because I talk to a lot of them, and I guess Team17 is compelled to answer. This will be the first game that I don't pre-order. Against all reason I have had blind loyalty to the Worms franchise for a very long time and I just can't support them anymore if they are going to continue to make stupid decisions regarding my beloved franchise. They really need to start listening to longtime fans instead of catering to noobs and trends.