Thanks for sharing the screenshots and the details - it looks great!
You can use the SmartThings Scenes custom tile if you want to control your native SmartThings Scenes.
We also have a private beta that just went live for a next generation SmartThings integration which exposes the Scenes functionality as well. Feel free to send a note to support@sharptools.io for more details.
There’s a feature request for Visual Grouping of Tiles that you may be interested in casting a vote on.
Is this for the various contact, motion, and water sensors in your screenshots above? I don’t believe there’s a feature request for this yet, but feel free to create one.
I’m going to break this part of the post out to its own thread as it’s likely to generate some discussion. 
Edit: Here’s the link to the discussion on SmartThings Groovy to Edge Change and Impact