Subscription Servers, Channels and Promo pages

I would like to have separate subscriptions to different channels within my server. Also would like to be able to customize the promo page, for example you offer to change the button color, but it would be nice to also change the background, foreground and box color around the server logo on the promo page.

Would also be nice to create a custom vanity URL for the promo page, channel page etc.