I've said it before, and I'll say it again (and I'm sure my colleagues will agree) - you'll work with a great group of pilots. Everyone has already been through a lot at other places and for the most part, people are grounded and bring a lot of experience to the table, without too much of an ego. That being said, you can find people complaining about just about any carrier on here.
Though a lot of my posts may come across as such, I assure you that I only state facts and not opinions. Unfortunately, you'll be hard pressed to find someone that disagrees with me about the current state of affairs at CPS. Yes, you will get a fairly quick upgrade - just do not believe anyone if they tell you when and where it will occur, and at what pay rate. There are no guarantees, and of course that makes it nearly impossible to budget for those uncertainties.
Good work on your part in talking to the pilot group before coming here. The initial batch of us didn't have that luxury, so we're learning the hard way. Trust your instincts, but do whatever is best for you. Everyone always has their own unique situation that must be evaluated.
And yeah, people senior to you are getting the ball in motion to jump ship...The minute every airline (except for AA) began hiring, CPS lost leverage but didn't seem to get that memo. Best of luck to all.