This reminds me of a few. Mainly, the End Turn button appears prematurely, I'll select it and then the game realizes I still have stuff to do and ask me for more orders, and early in the game I get confused and assume it's my next turn. Please, no placeholder techs! I can't stand useless techs! In fact, if possible, I'd like to see more passive bonuses with techs, and not just unlocking buildings. This tech tree makes me miss the Civ 4 tree in that regard, but I do not miss the Civ 3 tech tree!