I'd say for the trouble (yes even today, still) Metsu should by far be the superior weapon skill. So I wouldn't say "you are supposed not use it" because that just makes no sense. Rather "the developers are supposed to do something about it" instead of us just supposedly having to live with it.
You're basically saying: "please do not make Metsu better".
Good fer you, if you are happy as it is. ^^;
I, for one, would definitely like it to be improved, as I might actually some day make the Kikoku.