I'm not a lawyer, but my take on it is all those lifers who have wet dreams about relative seniority integrations have already TURNED DOWN the opportunity to go to the bottom of that list and work their way up, while many of their co-workers have opted to move on and flow and start that part of their career. All a staple would do is do that all at once.

An alternative is start actually having 50-76 seat jets at mainline, build the proper instructor cadre, and "flow" existing RJ pilots into seats in the same type on a different list. Probably many ways to skin this particular cat.