Just having a little think of what would happen after a longer ACW. I don't mean the South winning, but things going their way a bit better. Many 'small' POD's. Things like the Atlanta Campaign is more bloody and costly for the North. They get to Atlanta a few months later. The South wins the Battle of the Wilderness and stops the North advancing, again, for a few months.
The South would still lose, no question, however, more men lost to the North and a war which lasts into early/middle of 1866, without the North over running all of the South.
How would this play out, post war?