To fix Raw, you'd have to start at the root of the problem. Brian Gewirtz should be completely deep-sixed from the writing staff along with the other supporting cast. I've heard better booking ideas from teenagers frequenting this and other message boards than from some of the WWE's collegiate grad dumbshits who know plenty about writing, just not when it comes to professional wrestling. They need to bring in someone who can book with intelligence and that actually knows the business. Who? A number of people. Paul E. couldn't do any worse, and would definitely get the wrestling aspect of the program out of the gutter where it's sat for quite some time now. If they gave him entire autonomy over the product, he'd scoop heat like there was no tomorrow with angles and could build legendary feuds. Next, the creative squads on the other shows would have to be changed over and talent would have to be shuffled from all three shows.
The pacing of the matches would have to change to a more intelligent level that requires a little bit of setup instead of people just running through their signature spots. The shows would have to be booked in crescendo fashion again instead of Vince McMahon's quarter-hour ratings scheme which makes the crowd response disjointed and lackluster a lot of times. Those who can't support their title like they should (Cena) in terms of the workrate would either re-educate themselves or be shuffled into the tag division. Those with more consistent workrate (Edge, Michaels, HHH, Carlito, Orton) would be fighting for the title so it would actually be worth a damn.
As far as the moves for Raw?
All heavyweight tag teams moved to this brand and fight for a unified title as the existing talent would be decent but tag teams like the Hardy Boys, WGTT, would be re-united. Other wrestlers who don't necessarily have a solid direction would be set with others in tag teams featuring a unified gimmick and team name that they showed chemistry with. I.E. Dykstra and Masters. The division would also have special matches designed strictly for the tag teams that would give the belts more esteem. The main problem with the CW and tag divisions is that too much of the talent is spread about the shows, and not enough focus is brought toward enhancing each one, but instead is about just filling holes.
All cruiserweight wrestlers moved to Smackdown to fight for their version of the X-division to rescue the CW title from the garbage can it's sat in since WCW folded. Kendrick, London, Super Crazy, Guido, Re-hire Mamaluke, Helms, and possibly any more indy stars they could get a hold of that are "free agents" so to speak. These matches would be extended and placed at the beginning of the card. Moves would also be unbanned and a high-risk offense would be the key to revitalizing it. For example, Helms would dust off his old finisher and actually start working for his money again. Cruiserweights would also be allowed to have their own gimmick matches instead of being overshadowed by heavyweights in gimmick matches that they don't actually have the talent to uphold.
Indy talent would have to be brought in that can actually work worth a damn instead of the half-baked table scraps from OVW and DSW.
Women's division would either be completely re-tooled or scrapped altogether and the remaining divas would be managers or interviewers.
Raw would become a heavyweight centric-program. The useless T & A that is shown every now and again wouldn't be on there anymore. The storylines would be enhanced so as to draw more awe from the crowd and worked shoot-type promos would be the method of madness. The matches would also have clean finishes or at least a dirty pinfall or submission. No DQ's, countouts, or no contest stuff. There would also be no more five-minute squashes that undermine the lower talent to a degree where they'd never be able to get a plausible push. Every victory would have to be a hard-fought encounter. Title matches would unpredictable in terms of the outcome and the finish of the matches would definitely be as far away from Cena's pre-digested prototypical wins. I would want the people to keep guessing as far as what was going to happen next. If they already know how it's going to end and can call spots in advance...what the hell is the point of watching in the first place?
Roster cuts/changes from Raw Roster:
Hacksaw
Eugene's character (Dinsmore would be re-tooled with a decent gimmick)
Flair would strictly be a manager
Khali fired
Viscera either drop major weight or fired
Umaga would be given a different gimmick entirely, but would still be a top wrestler in terms of his spot