If you are concerned about your upgrade percentage, you may also want to consider Airtran out of CAK. I have largely abandoned Delta for Airtran because of the following:

* Much better fares in the markets I fly
* No regional jets!! (a big one for me)
* 100+ channels of XM radio on all flights
* Paid upgrade ($40-$80, depending on distance) available 24 hours before departure for Elites and at airport for non-elites. My upgrade percentage = 100%.
* My comp upgrade percentage = 60%

On the downside:

* Serves fewer markets than Delta (but does serve the domestic markets you list)
* Less flight frequency
* No international service except the Bahamas