In Trim, most of what you've said, I was going to say.
Having worked for an operator who made the same change, all these arguments were brought up at that time.
Issues such as Airstairs (or not), baggage holds that are too high, engineering problems etc, are all important, but being selfish about it, it is ALL good news for the pilots.
Get the type rating, get the experience and then leave fi you want to. Just don't let them bond you and make sure you get the package right.
By the way, the Airbus is worse on dispatch reliability (with my airlie anyway).....trust me.
Regards