Interesting analysis.

Another pro for DL is that they offer free CRC memberships to top tier. ^

However, a big con for DL is that there will no longer be premium seats on transcons, as they go to all Song in a few months.

I'm not sure counting the sheer number of seats in a market is indicative. CO is a smaller airline than others and one would expect them to have fewer F seats. Now if they have fewer F seats as a percentage of seats or market share, then that might be an interesting number to look at.