Looking over this thread, the talk of sending Early's corps to Georgia is interested. I recall that Grant feared it would happen and sent Sherman a telegram warning him of the possibility.
However, most of the posts here suggest that Early would have been sent to oppose Sherman's "March to the Sea". That was in November, a month after Early's force was wrecked at Cedar Creek. It seems to me that the time frame would have been mid-June (sending him west rather than into the Valley) or mid-July (sending him west after the conclusion of the Raid on Washington). In other words, he'd be talking about Early's force being sent to Atlanta before it had fallen to Sherman's army.
What would Johnston or Hood have done with 14,000 crack infantry reinforcements?
And yes, it would not have been easy to get them out there. But as Richard McMurry points out in his book on the Atlanta Campaign, the Confederacy had actually had enormous success utilizing rail transport throughout 1864, rapidly moving Polk's corps from Mississippi to Georgia and rapidly moving troops from the Carolina/Georgia/Florida coast to Virginia.