Definitely agree. For now please refer to Everdo Help / User Manual / Documentation in it’s current form. You can also try searching the forum - many questions have been answered here.
Do you mean in the desktop app? There’s a setting like this on Android because the user typically opens and closes the app often. But on desktop the app is open most of the time, so is it really important?
Also switching views is just one keypress away: to open “Next” press “2” and your are there 
When it comes to “time” and “energy” properties, I think the user is supposed to use them as filters most of the time. In this case the appearance is irrelevant, but the icon still allows to see the information if needed. In other words, If you are going to manually scan “Next” for items with “Hi” energy, I think it will work poorly regardless of how ith colored. Why not just use a filter?
Replied to your topic.
I think this would be useful if actions were being scheduled for specific time. Instead Everdo only allows scheduling for a specific day, so the usefulness of real-time notification is questionable. There’s a plan to develop calendar integration in the future to push scheduled items to services like Google calendar.
In the future It could be possible to do this as a separate app (desklet) that would query an API provided by Everdo. But running the full Everdo app would still be necessary to do scheduling and syncing properly.