Just saw this update and thought I would give TKOM a spin.
The tech tree is an awesome idea. Few issues though. The UI is way to big for me and the inability to zoom out makes it really annoying to use.
I know you will probably hate me for saying this, but take a look at he KSP tech tree. Something like that is way more functional and user friendly.
Then secondly, I am seeing a lot of things in the tree that I have no idea what they do. So I would much prefer if after clicking on an item a dialogue popped up with a brief description and an unlock button inside the dialogue. This would also prevent accidental purchases.

Thanks for reading.