The smart ones are not concerned with score at all.
Removing attack will only succeed in making some people even more timid in order to protect their precious rank, it will not make any of them any less timid. And it will not make the score any more valid.
Being the holder of top score in any category is worth exactly $0. It won't make you rich. It won't make you popular. It won't get you a car, it won't get you a house, it won't even get you a cheap cup of coffee. It won't get you laid, it won't even get you kissed. So why worry? The most it will get you is your name on the front page for a day or two, and who notices, or cares?
The guys I know and see having the most fun do not worry about score. At the most they'll fool around to see how it can be manipulated. And no matter what you do, score can and will be manipulated. As far as what those guys having the most fun for their $15 go, they use their statistics to judge whether or not they are improving with a new idea or technique, and then only if there is not a huge difference.
Changing the score format does nothing other than slightly alter how a few fly to pad their score, and change who the format favors. Again, it would be best for the fights, and the game, if only statistics were available, so that players could determine if they are improving or getting worse, and possibly where they need help. The rest is completely pointless, since holding a high score will get you nothing, regardless of the format it is done under. Score and ranking is probably the worst thing for the game, the fights, and the community.