After some time playing ES2 I realised what personally I would like to see in a Tech tree. It is not about the way it looks (there was a huge discussion should it be a circle-like or Endless Legend-like) but it is about size of the icons tooltips and research description.

This game has tons of art. Unfortunately, all research description appeare in small resolution. 

My idea is to add an opportunity of changing the size tech tree research description in game options. Sometimes it is hard to read a small font. By increasing tooltips size you will give us an opportunity to enjoy a beautiful game art.

Or tooltips with description can appear on a right side of a screen.

Thank you for attention.