Just as a lot of the Continental Army officer corps made up much of the old Federalists leadership, I think we'll see a lot of Confederate officers join the "Whigs" for a stronger government. They'll know how inefficient and self-defeating the CSA government was, and they'll look forward to reforming things to be more practical. Officers who saw their troops starve and not have enough ammunition tend to want to make sure the next war will see a more professional army that will provide regular food and other supplies.
I've always figured that the confederate officer corps, particularly amongst the younger officers would be the biggest proponents for modernization in the CSA. They would be a highly educated, professional class that would be well aware of the military applications of industrialization. Many of their members would come from the CSA's ruling families, with others promoting themselves based on merit (how many other avenues for social advancement are there in the south) However said individuals would tend to be of a different generation than those in power, and increasingly frustrated with the political promotion of the Confederacy as an agrarian republic.