There has been a loss and of jobs and stagnation on the East since the merger, 200 actual positions, more if you consider that the 150 E190 positions were replacement for higher paying group II jobs. The West has had reduction and stagnation as well and it had nothing to do with USAPA as it did the run up in fuel costs, followed by the financial meltdown and dubious decisions on fuel hedging and investment securities.
The only reason the reduction and stagnation has affected the West more is they lacked the attrition contained withing the East seniority list. In fact if it weren't for East routes that can support $100 barrel of oil and the 24% of West required block hours being flown on said routes, the reduction and stagnation on the west would have been deeper.
The West frustration lays in the fact that Monda and many other East pilots are advancing from attrition and will continue to do so at a generous clip despite the RIF of the last 6 years because of attrition the West claims has limited or no value. Monda will likely be mid range block holding Group 1 FO, or a very senior Group 2 FO this time next year, and be a Captain if he wants within a couple years of Age 65 retirements commencing.