For authors: Stover, Zahn, Luceno, definitely get more work. Allston & Denning get in as well, as long as Denning keeps his weird sex fetishes in check. Traviss as long as she has an editor go through her work and TONE DOWN all of her anti-Jedi propaganda/Mando love (and hire a linguist to make Mando'a into a useable conlang).
Storylines: The Bantam era gets plotted out in advance, to remove all of the "X supervillain shows up, gets Y doomsday weapon, heroes must stop to save galaxy" thing that was so prevalent then. The Crystal Star is canceled. The Yuuzhan Vong invasion arc gets a team to go over and advise authors on characterization. Dark Nest & Legacy of the Force are totally revamped: Traviss is replaced with a non-Mando-obsessed author among other things, and too many changes are made to get into here.
The Clone Wars movie/series gets killed and replaced with a series adaptation of the EU's previously-established Clone Wars canon so as not to totally fuck continuity.
The Old Republic's plot gets changed so that the Jedi aren't (for the thousandth fucking time) getting blamed for something OR having the galaxy turn on them when they should know better by now and Coruscant doesn't get sacked.
Dark Empire stays as long as: some changes made in anticipation of the prequel trilogy, some goddamn decent painting is made so that it doesn't look fucking horrible, and the whole Luke-went-to-the-Dark-Side thing plays a much larger role in post-DE material than it does OTL.
Other than that, Legacy stays as-is. Original trilogy-set literature/video games/comics/etc. are made so that it's not like it is now where all of the original heroes' lives during the 4 years between Yavin & Endor are fucking used as storylines (or so it seems).