Graphics are really cool. Your job is very promising. I want to see more !
You could add bosses that take several slots and can be played by players or AI.
Good luck for the future.
Perfect !
Have you planned an online mode ? A level editor could also be interesting .
To my mind, do not hesitate to diversify skills of the mercenaries while making sure to keep weakness to the units.
I would like to see a tactical game, challenging, punitive and authentic game. I think, you are on the right way !