Scepters and quality

Am I missing something. You don't get any improvement to spirit, no improvement onto the weapon skill. First, what is the point of upgrading scepters? Second, is there any way to improve the quality of a weapon skill(outside of menial things like fox talisman)?

I have also raised these concerns, you are not alone. Reference to my post: https://www.pathofexile.com/forum/view-thread/3753897