I recently picked up the game and had my first campaign as the union. I won in early 1864. The Confederates had 28% of Union land power, but about equal naval. During the game, I assumed l didn't understand the power numbers, because I saw little evidence of the southern navy attemting to interrupt my operations. As it turns out, it was all "hiding" in Texas. Looking at the numbers now, I am amazed at the size of the Confederate navy, which includes:
7 steam Frigates
13 frigate squadrons
They had 47 fleets, and the number doesnt include the many brigs and transports they had. In addition, of the 35 units in production 20 were naval (including 6 more Ironclads).
Perhaps the size of the Confederate navy was the result of my inept blockade, which I have no doubt. But looking at the southern evonomy, they had 0% inflation. By contrast the north had 11%. So they never printed paper money - which implies not many drafts of manpower.
As a side note, Athena made no practical use of RE Lee, except perhaps as a diversion. He ended the war in Tennessee with 86 power, and no subordinate corps.