I would make these changes:
-Put Tim and Steph back on the 'Tec book. Tim also gets his own book, with Steph playing a strong supporting character role.
-Babs goes back to being Oracle and Cass is given the mantle of Batgirl. Cass also gets her own book.
-Batman and Catwoman get married.
-Bring back the LOSH
-Bring back the complete multiverse and have other teams like the JSA exist on Earth 2
-Speaking of Earth 2, bring back the Earth 2 Superman and join the JSA along with Jay Garrick, Black Canary, Starman, Power Girl, Green Lantern, Hawkman and Hawkgirl and Mr. Terrific (Sloan).
-Bring back the Dark Flash and give him his own book that exists in another universe.
-Bring back Kon-El and give him his own book
-Give Wally (the real one) his own book
-Publish a JLA book with these characters on the roster--Batman, Martian Manhunter (the one from the Morrison run), Mister Miracle & Barda, Superman, GL (John Stewart), Flash (Wally West), Wonder Woman, Vixen and Dr. Light (Kimiyo)