If scope is relaxed again to a higher seat class, it will be catastrophic to our careers. The majority of domestic flying is currently the 120-160 seat class of airplanes (737, A320, MD-80).
Relaxation up to what it currently is (76-86 seats) allowed big enough airplanes that majors could fly more regional jets and replace all of the old 90-120 seat jets. DC-9-30s, 737-200/500, F-100, etc. They're all gone and haven't been replaced at mainline, because RJs are "big enough" to cover that flying, with additional frequencies.
The same thing will happen with the next step, you'll see mainline trying to not fly anything smaller than a 757. Almost all domestic / north america capacity will be RJs. It'll be the end of our careers.
If scope gets changed again, it needs to be in the other direction. It should be the #1 item on every MEC and negotiating committee's to-do list.