The problem with this is, it goes against what the Absolute was meant for in the first place. They were supposed to be reserved for the best of the best DC had to offer, and mainly catering to shorter self contained stories. Having big runs like Y and Preacher put into Absolutes is a little strange to me. Despite them being great stories, their length lends better to an omnibus or deluxe format. Sandman is an exception to the rule imo.