it would be really useful to have keys for produce units. buildings can then be tagged with numbers and without leaving a battle it would be very fast possible to press 1,a,a,a,a,a to produce some archer-reinforcement.
best would be to have a defined set of keys which are then used for all factions. the basic worker-units should have the same key in all factions (with the drawback that the letter might not fit the word but that would anyway be hard with different language.
the keys for changing the camera-position could be reassigned to some other keys because i guess nobody uses them regularly.