... why were they withheld until today?... Why? Why..
Oh, please! Grow up. Adobe, like any other company, is in the business of making money. Crippling features, timing releases, discriminating versions and pricing policies... these are all time-proven, legitimate marketing strategies.
Instead of psycho-analyzing Adobe's strategy, just use and enjoy this damn good product, that is giving us tools today unheard of in the history of photography.
They are giving us this phenomenal product, at the pace and with features as
they are pleased, because, guess what, it is
their product. You want better features, released at and for your convenience, write the damn code yourself.