Well yeah, if your thing is to help ranged combat out, and nothing else, then doing anything is better than nothing.
But the point is why do it through a capstone that only one class has access to? If you're going to fix ranged combat, fix it. Don't slap a bandaid on it and say "well it's kind of ok if you take 20 levels in this one class". There are a ton of problems doing it this way.