Sorry to draw attention back to this, but Dabur, do you think you could stop the "Hi" and "Have a nice day" thing? It's nice to be wished a nice day, but I must admit it gets annoying after a while, and simply uses up more space when it'd be better to rapidly get to your suggestions on actual issues. Thanks.
One change I'd like to see is an option similar to the "why don't you attack" and "why don't you research" options with Vassals, where you could ask a vassal not to trade techs you give them to other civs. I like to create strong vassals by gifting them my techs, but it seems like sometimes I shoot myself in the foot when I give the Inca Assembly Line, and then suddenly I'm facing infantry in civs I previously had an advantage over.
Another part of this would be making vassals (or at least those you vassalize voluntarily, instead of capitulating) always be willing to trade techs with you. It's quite annoying when you bring a vassal up to speed with the intent of them helping with your research, and they then proceed to say "we are worried you are becoming too advanced" instead of trading you the techs that you groomed them to research.
This is really important, I always have vassals that are more advanced than me because I gave them techs,and they won't trade with me.