Much much much better :) Though, and trying to be as grateful as possible here despite what I have to say, the brightness of the new colors is actually almost a bit too much for my eyes?
The look of the skill tree is terrific! The way the "required" key works is awesome! It will be very useful to players as they decide what to learn. Great job, ts!
I like this one, but I loved the older one (with the actual skill images. You could even maybe show progress of learning with progress bars on the icons (like app downloads on iOS)!
Also: With the "required" thing... maybe have it highlight ALL the requirements? Ex: Skill A requires skills B and C. B is standalone but C needs D and E, which each require three other skills (FGH, IJK, and LMN respectively, etc) So all of those would be highlighted.