Although the direction is admittedly different, I do find it ironic that the strongest anti-Regen arguments are from people who want the Prog to revert to back how it was when they were kids. (Not saying Link Prime made that point, note.)
As for size, they’re not quite double-length. A standard Prog is, what, 32? Regeneds have been 48/52. For subscribers, there’s no price increase, so they’re getting more pages for the same outlay, which if you like two thirds of what’s in there means you come out even.