I dont know if the Feds would have ceded both Maryland and Delaware to the CSA, Kentucky probably.
Not impossible they move the capitol back north but i dont see it happening, unless the south has a real choke hold
The Feds were barely holding on to MD in '62. I will agree with you on Delaware. Also, the yankees may have been reeling bad enough to cede whatever necessary to end the conflict.
If I recall correctly, Delaware had some key manufacturing facilities (gunpowder etc), I cant see that going, unless the south had whooped our ass, which it looks like in the scenario.
Not to get all Turtledove here, but perhaps the north and canada get closer, perhaps a union or some sorts (forced one way or the other) by the late 1860s or so...