On my first game after the patch the tech trading system of income generation seems to be done away with. You can still buy techs but....all of the AI are researching the same tech tree at the same time...so there is no one left to sell them to. If there happens to be one stragler...they won't give you squat. To bad...this one one of the only ways to keep on on Diety level. If you are having different experiences let me know. This game is on Emperor level right now.