I have been using Losant Sandbox for a few weeks now and overall it is excellent.
Based on my usage, I have a few suggestions for dashboards and workflows as follows ;
Is it possible to add copy/paste for individual or group of Nodes that make up a workflow ?
This would really speed up workflow builds as it pre-populates new nodes for further editing.
The whole input/output graphic boxes in Dashboards look very basic. So, I suggest making these graphics more colourful and rounded eg. use proper switch and lamp symbols with internal leds on switches for feedback. At the moment on the dashboard, you cannot easily differentiate between input and output blocks and so you end up pressing on output blocks instead of switch blocks. Allied to this, is the fact that controls block is not centered. It would be better to have individual control blocks with better graphics as above.
On the dashboard, Maps look very black when in Dark mode.
Hope this helps going forward as you build on the best IoT platform around.