@HAP 

A few things.  When smart home products first launched Smart Actions weren't a thing.  They have only been around for the last year or so.  New features do take time to properly implement.  The primary focus was to make sure all Kasa devices were compatible with the service.  Now that they are the team can refocus on expanding the service.  But there is more to it than just updating the software.  Everything from  server load to cost has to be evlauated and that does take time.  While customers only see the end results and can speculate that the fix or enhacement is easy, its not always the case.  

Also consider in your specific case you are from what i gather looking for just setting mulitple schedules to go at the same time.  You can do this already though its a manual process and setting on and off schedules on each device.  I understand you are looking for a way to do this for a group so you only have to set the schedule once.  While using schedule a scene (one for on and one for off) is possible right now you can only do once instance for each to do two on and offs it would require 4 active smart actions which is not possible right now. 

@nat44 

No nothing as of yet.  We are still waiting for an update. 

@MRG2 

They are working on solutions but nothing available yet.  That's all we have been given.  When we know more we will update this thread.