I think one of the goals of SmartThings has been to reduce and minimize the user involvement. I would guess this is why a specific control panel was never really envisioned. For instance, the use of a presence tag could automate many of those functions. Let’s say you have Mom, Dad, Billy and Sally, each with their own unique presence tag.
If the Hub sees no presence tags, the system automatically goes into “Alert Mode”: Any sensor or motion detectors trip will send an alarm.
If the Hub sees a child or children arrive but no parent, it automatically goes into “Safe Mode”: Motion sensors are turned off, but alert on doors/windows still active.
If the Hub sees mom or dad, then the system would be in “open mode”: Sensor, alarms, alerts are turned off.
Merely bringing a presence tag into range of the Hub, or removing from range of the Hub, will automatically arm/disarm whatever you want it to. There is of course some potential issues with this. For example, what if Billy forgets his backpack at home? Then the house never really goes into full Alert Mode.
If you really want manual control the alternative is to use a cheap tablet as your panel. This is my plan. I have a smart phone, but no one else in my family does. My Billy and Sally each have a tablet, and Mom has one too that she uses only occasionally. I plan to have this one centrally located in the house so it can be used as a control panel. I know of at least one other person who is mounting a tablet on a wall for the same purpose.