For me, the reason I like Combat Zone, almost as much as Necro, is because it's so much more....... flexible.
You don't like a rule, change it. You want to add in certain extra actions or events, do it!
The rules themselves just lend themselves to being modified. I've written about 6 different scenario's for the game based around one premise or other, and every single one of them only works because of how easy it is to modify the rules!