Generally speaking I'm apt to approach a "if it isn't broken don't fix it" mentality. Or in the case of this game, if it isn't measurably overpowered (talking average KDRs of users, average Kills Per Round), probably leave it be.
I think most if not all will agree to this.
However, we don't have statistical data on kills by weapon type, class or build. It's a shame because the server logs generate this data and all that's needed is an algorithm which processes it and puts it into an understandable layout. It should not be too difficult to make it for a somewhat experienced coder, I guess it's possible using Perl RegEx.
Such a thing could drastically improve balance decisions, and it would no longer be subjective what is broken and what is not.
But right now the greater problem we have is that server logs aren't updating.