YX may have been a stepping stone at one time (and I think that's debatable) just as Republic is considered a stepping stone now, but what you are missing is that YX made it. They managed to transform themselves from a regional player to something that was considered a Major, with a pay scale (almost) to match. And yet, somehow, they managed to get dragged back down to the regional level of Republic and all of us other sorry ass RJ drivers.
Personally I won't go down the road of Republic pilots are destroying the industry (despite having to listen to one complain that they were going to a mainline get and we were going to an express gate so we should wait for them this evening in CLT). However, Republic (as a company) has destroyed a Major Airline. End of story.
Is it possible that *someday* Republic will themselves become a Major (with Major like work rules and pay)? Maybe. THAT will depend on the testicular fortitude of the pilot group. I'd like to say I'm optimistic but I just don't know.
EDIT: I don't mean to tick anybody off or offend anybody with this post. I'm currently having a hell of a night and may be taking it out a bit through the keyboard.