Good idea! I think there are ton of keyboard shortcuts that need to be added to the game.
Here are some of the ones high on my list. I am a heavy user of keybinds and find the lack of them annoying in this game.
Trade Unit Hotkeys
[T] Activate Trade mission menu
Right now I have to hit the icon on the bottom left, which invariably makes the map scroll in that direction and this is annoying.
[SHIFT+T] Carry out last trade route (NEW)
disabled if target city has changed factions, city does not exist or route is blocked by misasma
[C] Change City
Brings up the change city interface for the trade unit
[F] Find best trade route (NEW)
A new feature I thought of to make trade management much easier. Since trade units have no range limitation the list in the mid / late game can become daunting, especially on larger maps. I describe its possible implementation below.
Brings up a new UI where you select which factions you want this trade unit to take its mission. The icons of the factions could be displayed on the side with check boxes next to them. Your own faction and stations would also be present. There should be check boxes or a drop down list for which yield is important to you (gold, science, food, hammers, culture). Once you have selected the factions and desired yields the user clicks generate list where the top city for each checked faction is shown. The user clicks the city of choice and confirmation dialog is shown. Once confirmed the trade unit is finished with his turn until the route expires again.
