I think this may hurt the PNCL guys in the long run. It would be easier to just give you guys a new contract and keep Colgan flying the props and PNCL flying the jet.
The reason I say it may hurt PNCL in the long run is because I think there will be more Colgan guys wanting to fly jets that the other way around. I for one would give a lot of thought in doing a transition from left seat Saab to left seat CRJ after a while, that way we can get that sought after Jet PIC everyone wants.
As far as how we will merge senority, a staple wont happen so nothing much will change. Here is an example. If a Saab FO has 1.5 years senority and 2000 TT w/ 1100 and with the merge his senority drops to .75 years he will still upgrade in the same time, as in now.