In general, Raw needs a tag team division that does not steal time away from their more prominently focused on aspects: the WWE title, the IC title, and the two or three main feuds going on. However, they're severely lacking in the IC range right now, so they need options to reflect that.
First, with Killings coming and Elijah Burke going nowhere on ECW, I'd LOVE to see the two of them team up and be prominent members of the IC title AND as contenders for the tag team championship. To help this out as well, keep Carlito/Santino as the sort of "fun heel" group. Then, for a bit of a balance, the "jobber heel" group could simply be Murdoch/Haas teaming up. Cade needs to move over to Smackdown and have a run at the US title or go over to ECW and be built up. He's too good to stay with Murdoch. For the MAIN face tag team on Raw, put in Yang/Moore, as they could EASILY help out the Intercontinental race whilst covering themselves as a fast-paced, explosive tag team that is fun for the crowd to watch. For secondary faces, use that as an opportunity for random tag teams of faces in the IC title chase, like, I don't know, Rhodes, Lashley, blah blah. As the "jobber face" team, since Rhodes will be moving past Holly soon, just team up Hardcore Holly and Val Venis. They're two veterans that, unless they're in a tag team, will do nothing but lose day in and day out, so this would be better for them. Their gimmick could easily just be a pun on the porn term "hardcore" fitting for Val, while Holly has his own designation with it. Hardcore times two, lol.
Smackdown and ECW need a lot of variety with a lot of different talent. The Edge-Heads headline as heels against Jesse & Festus for faces. Henry and BDV are boring in the ring but they'll fill in as secondary heels. Secondary faces go to Londrick, using them as the fast paced team. Team up Super Crazy & Funaki as the jobbers, since that's all they do anyway, for the final of the three face tag teams. The jobber heels could be the Highlanders. Split Deuce & Domino up so they can develop new personalities. Also, split up Morrison/Miz, as Morrison needs to move himself up to the US title or main event status, since he's good enough. Miz is good as a tag team wrestler, so when things get boring, team him up with someone else that can't get over as a singles competitor...like, Palumbo, or something, and repackage them to allow their styles to mesh. Every so often, just team people up that have nothing better to do. Wouldn't it be more entertaining to see fresh tag teams, even if they lose, than to witness the same job turns every single time around?
RAW: Moore/Yang, Killings/Burke, Carlito/Santino, Holly/Venis, Murdoch/Haas, plus a random face tag team
SD/ECW: Edge-Heads, Jesse/Festus, Londrick, Henry/BDV, Highlanders, Super Crazy & Funaki