What I'd give to have a root cellar...
I know what you mean, Jared. I am surely in the same boat--so much to be done, so little time!
I believe the birds I got this year were actually MMH's Cornish Roasters instead of their Cornish Cross. So I am still butchering chickens a month after I had hoped to be done with them. :/ They started out much healthier than the CX--no leg problems, no sudden chick losses (not that the percentages of that were very high with the 3 batches of CX I've done, but these had
none by comparison.) They free-ranged a little on bugs and grass and were more active. However, I don't know to what degree it affected them when my tractor blew over the hill and I had to change my management of them in the last 2 weeks before processing, but at the end it turned out that I had
more health problems with them. I've had several with congestive heart failure (meat and growth otherwise ok), 3 so far that had ascites, aka. water belly (much smaller birds and liver failure), one sickly runt that will just be culled and not eaten, and one with necrotic tissue in the breasts (tossed it all out except for legs and wings).

I've got 5 left to do that we didn't have time to finish last Saturday. At least one has a respiratory issue and I suspect it has congestive heart failure. I didn't like having them around so long. Increases the odds of things going wrong. I also lost one to an oppossum the other night after I moved them into the old chicken barn when we had that big storm warning.
The thing I liked with the CX was getting it all done and over with quickly. 7 weeks on the males/9 on the females. I like the high yield and the tender meat on the CX (even the legs are nearly white meat), but traditional meat birds are so much more sturdy and reliable. You have to expect at least some losses with either the CX or the Cornish Roasters. With the CX I've done in the past, I usually lose 1 to 3 chicks suddenly early on and about 2 to leg problems in a batch of 40.
I had 4 Easter Egger cockerels that we processed at 6 months old when we processed the 11 week old male Cornish Roasters and I was pleasantly surprised how meaty those compact little birds are. Dressed out, they were nearly as big as the Roasters. Since I really like the EEs for egg layers, I'm considering getting a larger batch of straight run on them next year and trying them out for meat birds instead. They'll probably do even better in the tractor.