I prefer the system now. We're seeing more teamwork, flanking, tactics (of course some rounds the teams are still retarded gung-ho rambo clusterfucks, but old habits and all). Going off a kill reward system would just promote more uber spam rambo action. Currently support characters (pikemen, spearmen, xbow/1hers) are getting to feel useful. In a kill system, they're back to the bottom of the barrel and would be better served rolling 2her like the rest.
Just my opinion though.