OK, so someone please lay out the specifics on how outsourcing more flying (loosening scope) will be a huge win for the employees and company.
Simple. Network contribution... AA's scope clause, particularly the 70-90 seaters, has cut AA out of a fairly interesting segment of the market.
The current scope clause pretty much allows AA to serve the smallest of the small cities with Eagle, and the largest of the medium size cities with mainline, but not much in between. There's a lot of flying to places in-between which could be lucrative for a 70-90 seater with a premium cabin (places where the F100 could have made sense had it not been a crappy aircraft design). Putting a premium cabin on a 50 seater is suicidal from a cost perspective, but not so bad on the CR7 and CR9 or the E75 and E95.
I'm typically buying business class. When I search for flights using my off-the-shelf corporate booking tool, AA won't come up as an option if it's a routing where ERJ's operate one leg of the trip. But UA and DL do, because they can put 70-90 seaters into those hinterland markets at will, and offer a premium cabin. Since most corporate booking tools will look to book an entire journey in business class first before they look at splitting booking classes, it wouldn't surprise me in the least bit if they're now capturing more of the long haul traffic from the hinterland cities. They didn't add the premium cabins just to allow upgrades...
If you consider all the places which don't have mainline AA anymore, but now have 70-90 seaters operated for UA, US, or DL, that's a lot of revenue being left off the table.
One of the few things I'll agree with WT on is that AA has become increasingly insignificant when you get outside the top 30 markets or so. UA, US and DL have taken their place, and they're winning more and more corporate business as a result. Corporate business is what used to give AA a revenue premium over the other guys. Not so much anymore. If anything, AA's possibly at a revenue deficit because the 50 seaters are tough to break even on.
So... how is that good for AA employees? If you want AA to remain a network carrier, you need to allow them to serve the network with the right aircraft. Having a decent network serving a larger cross-section of markets is where your future job security comes from, not a paragraph in a CBA.
Now, I'm sure AA could do just fine being a domestic point to point carrier like Southwest, providing feed to oneworld at the gateways. Doing so would really allow AA's costs to come down, but it won't do much for career progression...