Destructible environments would very likely do more to screw the game up than they would to add anything. More maps I clearly agree with. Other than that you listed a bunch of graphical enhancements, which is what they tried to do going from 1.6 to source and had a bit of a negative reaction. I'm sure a lot of people are hoping that one day a new CS will come out with up to date graphics and gameplay that both the 1.6 and source crowds accept. That would be my ideal scenario.