I don't think so.
Furloughs are not nearly as likely as more hiring, probably within 6 months. The only excess in pilots right now is about 30 pilots in the ERJ. They are going to sucked up quickly be the 700's since they never had them fully manned in the captain seat. Plus, don't forget that J4J specifies that USAir pilots will only be hired to fill half the seats on NEW aircraft, not any of the aircraft Mesa Air group already flys, the other half of the positions will be pulled from Mesa pilots so there will be a net increase.
Also from what I understand the new Scope agreement means that any operational changes at Mesa that will affect 25% or more of the pilots has to be approved by the pilot group, so Johnny O can't simply get rid of any aircraft on a whim anymore. The props aren't going anywhere.
Still, I do agree that anyone thinking of coming to Mesa seriously consider other options, at least for right now. The union's priority was scope, J4J and the single seniority list. That means that there likely won't be any pay raises, quality of life improvements or anything else improved. The meat of the contract will be status quo, leaving us under the same sub-standard conditions as we are already flying on. I'd recommend going to some of the other regionals hiring like Comair if you have any choice at all. That is, unless there are people out there who like flying a jet for a part 121 carrier and at the same time still qualifying for food stamps.