When creating pages in the Content, Pages area of the new Persona Bar, any site based skins and containers are not visible to work with when in the Advanced, Appearance area. I.E. when you manually create Skins and Containers folders underneath a specific portal/site in a multi site setup that is pre 9.0.0, you can see both the Host and Site based skins and containers to select from, both in the Site Settings area and when editing individual pages in Page Management, which is very nice when you have a large multi site configuration. This is big as it prevents customers from accidentally selecting and/or changing other customers skins and containers (which can go south quick). This area needs to have some sort of a selection tool to choose the Host and Site based skins and containers.