TL;DR
Technologies required to research science packs should be included in the "Show Essential Technologies" button.What?
Currently: The research tree when showing only the essentials looks something like this:
Which hides technology you actually need to research that essential technology. Instead, it should look something like this, with the actually optional technologies not present in the shown tree:
This would include technologies which aren't technically required, but practically are to beat the game -- Railgun comes to mind first, as there's no real alternative that will actually work in the base game.
Why?
Sometimes the tech tree is overwhelming, and you want to see just what is required to beat the game. The current toggle does not do this, as you still need to disable it to see required techs for the science packs. By showing these techs required for other science packs, the option becomes more useful for the people who actually need it.Specifically, it would help people who are overwhelmed with everything the game has to offer now navigate the tree and discern what they need and don't need.