The problem is that everything you see isn't yours for the taking, your at the back of the line. If upgrade times are fast when you hire, they will probably be longer by the time your seniority number is called because they upgraded such a large number when you were hired. Its like an airline hiring like crazy when you get to your 250hr CPL. By the time you get to the 1500hr mark that airline probably did all of its big hiring and unless some massive growth happens, hiring will halt for a good while.

Heres some factoids to consider: the regional industry will not be expanding anymore, and fleets will add larger aircraft to replace smaller ones, so you have a net loss in pilot demand at regionals. My point being is that in a pursuit of taking a worse off regional to get a fast upgrade, you run the the risk of that airline consolidating its list with somewhere else or getting furloughed. So now instead of accelerating your careers its stalled, and your stuck at a company you dont want to be with. I believe as we've seen with the majors over the past 20 years, we will see the same at the regional level over the next several years. Fewer companies existing that is.