The entire point of the game lies in discovery and finding new ways to make space travel a viable option for mankind. Learning what you need in order to get to higher levels of research was part of the exploration with the game.
The only issue with a system like this is players unwilling to attempt to try new things and learn can often become frustrated and irritated by feeling as though they are wasting points. In order to aid with this the next tier of research will now be shown indicating what you need to research first in order to move onto the next level. This is a bit of a compromise by allowing users to have some insight into their decisions and choices without giving away the entire research tree long term.