And when you're not doing that, it just seems like a pointless, perfunctory step. I see it and, to me, it looks like if Hunters had (to simplify things) a button labeled "Build Focus", a button labeled "Spend Focus", and a third button that just says "Focus Spending Form". It's perfunctory. Rogues don't have to hit a button to enable spending combo points; when they fill them up, they just spend them.
Now yeah, PVP? That's fine, that makes sense. From what I understand, PVP is all about finding an enemy's moment of greatest strength and negating it or finding their moment of great weakness and exploiting it. Control is king, etc, and far more common. I can even get why people would like having a button that essentially says "On My Command, Unleash
Hell Void".
That's why I think there ought to be an option to go one way or another.