I'd like to propose a few minor changes that would make the game, at least in my opinion, more enjoyable to play:
1. Add the possibility to type the desired number of goods in the trade set-up window. The slider is nice, but imprecise, especially if you want to sell 10 cannons and have a stock of hundreds. Likewise, using the slider to get to 110 gold coins is a recurring annoyance. Better add a place where we can type the number, and better still, add to that a drops-down list with the 5 most frequently used amounts for that resource. It will make trading a whole lot less cumbersome.
2. (this applies to the new system only): In the new trade window, the view often resets to the top of the list. This is extremely annoying if you're looking for a resource far down the list and need to do some mental maths to decide if the deal is worth it. 10-to-1 you have to scroll down again to take the trade...
3. Military: please add a button that removes all assigned units from a general. Again, having to put down 5 silders isn't the end of the world, but if you have to do it all the time, it becomes boring. This game shouldn't be boring.
Also appreciated: give the veteran and battle-hardened generals a color code (a distinct banner or something) that makes then recognizable. Having to search 5 camps to see where your sole veteran has ended up is likewise boring.