Well, I will say that Dragoons and the Medical Corps have a chance at being on the battlefield, however I do not think we will be including Ordinance. For the most part, those in the Ordinance Department were staff positions, and did not go onto the field, but stayed at a posting of some kind, such as at a fort.
As for Dragoons, while the 1st and 2nd US Cavalry had both previously been dragoons prior to the war, they had been reorganized to be light and heavy cavalry during the Civil War, and with the possible exception of a state militia unit or two, there were no dragoons to be found during the Maryland Campaign.
As for the Medical Corps, there might be a chance to include them in the field. However, we are a little early in our development to say either way (the old refrain).
What are your guys' thoughts? Should the Medical Corps be included? Is it advantageous to include them, even considering that this role would take away players from the more important roles such as the lowly, footslogging privates?