Also: I would be happy to see the "speed up" button have 2 or 3 more levels of speed above what it has now. I find I rarely need to build units in combat, and sometimes the hordes of monsters are just marching to their death too slowly for my tastes.
When in combat, a unit's stats should be visible without the player having to build the unit. If I have only 25gp and need to choose which unit to place, I should be able to see their damage and attack speed.
Also: can the escape key please cancel out of screens so that we didn't have to left click the "X" every time for every window (especially the unit level up window)? It would be really handy.