DC should/could be making this so much easier in the long run.... return the "original" Multiverse.
SOme tweaks would be required, but this is really what's needed to simplify everything, respect old and new readers...
Convergence ends-- boom! The real Multiverse is back.
Earth 0= Post Crisis Earth (it's the most cluttered, since it was the compression of the MUltiverse in COIE-- therefore it makes sens for it to be the "original" Earth... we get Perez Wonder Woman, etc...
Earth 1= Silver/Bronze Age Earth One.
Earth 2= Golden Age Earth Two
Earth 3= Crime Syndicate
Earth 4= Thunder World (Shazam)
Earth 5= Flashpoint Earth
etc
etc
Earth 22= Kingdom Come Earth
etc
etc
Earth 52= Nu52
Fill in the other Earths with whatever Elseworlds etc you want...leave them open...it's INFINITE and doesn't matter.
If DC wants to then focus on Earth 52 (nu52) then fine-- but at some point we can cross over to the other Earths/continuities.
But what I'd love to then have happen is for DC to create a half dozen "banners" under which certain titles would appear-- so Like "Nu52" banner includes whatever 6 titles they feel are most important. Then you have "Earth Two" Where you get titles like "All Star Squadron"-- set in WWII, and then maybe a modern JSA and Infinity Inc. "Earth One" banner includes the satellite era JLA, Broze Age SUoerman, Batman, WW, New Teen Titans, etc etc..... "Earth Zero" (or Maybe "Post Crisis") has the bwahahaha JLA and Perez's WW....
By opening up the universe to both old and new continuities we have more story options.... we know that even if we don't see the version of a character we love, well then they're out there. We could have nu52's WW pairing up with the Golden Age WW on an adventure, or "Bwahaha" JL pairing up with Kingdom Come's JL...... I dunno-- it just seems like more fun!
Matt