iOS 10 | iMessage Groups Concept

Having a blast time exploring iOS 10 debug ideas with Principle app.
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In the current iOS 10 beta, topbar members view gets expanded horizontally. At ux level, horizontal scroll isn't convenient to browse a list: (1) cropped by safe width area, (2) showing 3 items at a time, (3) plus objects are not clickable. Frustrating, the click-to-expand finally forces user to leave chat screen anyway, by accessing group details via info icon (upper right corner). As a result, the whole experience makes the purpose of the click decorative more than helpful.
I wanted a quick and relevant access to members list without leaving chat screen. Using vertical expansion instead of horizontal scroll, the topbar could turn into a sheet, to better enable quick actions - invite/call/etc - items are now clickable :)
The purpose of the sheet is to save you unnecessary navigation and clicks to access immediate information as needed. If more than 7-8 members, sheet's height should preserve click-outside to collapse, and scroll-in to browse list. Some quick shortcuts can be added via swipe/press-hold gestures to create new contact, txt, call, etc. Consistent behavior would apply to 1-1 messages, as well. I'd love to post a version of it!
Have a nice weekend :)