It would be nice when a tech has completed research that the tech tree when opened goes to the area of research that was last researched.  Example is if I just completed a warfare tech, I would expect the tree to pop up in the warfare part of the tech tree.  I do believe that right now it always defaults to the civilization tech field which sometimes confuses me on what I just researched.

This brings me to a second point but less important is that it would also be nice to somehow highlight the tech that was just researched last on the tech tree.  I do realize that the popup window that comes up before the tech tree has this information but I think having this information in the tech tree would add a nice touch to deciding what to research next.