Semore,
You generally seem like a level headed thoughtful person, so I'm surprised by your viewpoint. In this case, it sounds like you actually know why it was fair and the right thing to do. As an outsider, I was pulling for all of the NJI FO's to get an early upgrade. NJASAP wanted to combine so they could take NJI's big airplanes for themselves. Very few from NJI wanted the merger back then, but NJASAP wanted to steal those G seats for themselves. The career expectation for pilots who met the qualifications and accepted positions at NJI was to upgrade into a Gulfstream. Pilots love to screw over other pilots, so NJASAP forced the integration that was not wanted by the NJI pilots, and some are still pissed they didn't get more of the prize for doing so.
You can argue that it worked out well for everyone, and that the NJI pilots are better off today. That might be true, but the NJI pilots wanted no part of the integration because they knew you wanted their seats. I'm glad they got to keep them. In my book, that's fair.