Without having guys switch brands and just going off of the current SD Roster:
Main Event: Sheamus is going to take the belt off of DB @ Mania, and quite frankly I'm okay with this. He is clearly being built as a next top face by WWE, and IMO he has all of the tools to do it. Unique look, good size, great move set for a guy his size, and good mic skills fella.
Main Event/Upper Mid Carders in order of importance: Orton,Wade Barrett (top heel, eventual WHC after a nice reign by Sheamus), Christian (face), Mark Henry, Rhodes, & Daniel Bryan.
Mid Card: Big Show (used to elevate talent), Sin Cara (IC Champ after feud with Rhodes following his return), Mcintyre, Hunico, Justin Garbiel, Santino, Tyson Kidd, Trent Barretta, Heath Slater, Dibiase... put a re-emphasis on putting on good wrestling matches in the mid card, something we had come to expect out of Smackdown. Make the IC belt a fighting man's belt, it should be defended most every week and have storyline's surrounding it.
Cut: Great Khali
Also make the tag team titles more or less exclusive to SD without saying as much. Epico/Primo are a good team, utilize the Usos, tag Hunico and Camacho, and bring in new teams/form new teams out of the list of available mid carders. Similar to the IC belt, there is no reason why tag teams aren't put into storylines and feuds as opposed to being used as random filler, which does nothing but show your audience that you don't care about the tag division.
As far as specific feuds, it's pretty clear Big Show is about to feud with Rhodes, and unless WWE is completely brain dead (can't rule it out) he will be putting Cody over, which should help elevate him towards the ME. Rhodes would be a perfect guy to feud with Sheamus post-Mania (continuing his quest to become a duel champion), with Sheamus retaining the belt after 1 or 2 PPV matches. This gives time for Sin Cara to recover and then step in and take the IC belt from Cody who moves on as a full time main eventer, possibly feuding with a guy like Christian after dropping the IC belt.
Mcintyre is a guy I like, but his credibility is in the dirt right now, so a feud with Big Show where he cheats his way to a couple of wins could help give him credibility in the fans eyes, and he could be built towards an IC title feud with Sin Cara.
Bryan will start to be rebuilt not as a pussy, but as a legit tough guy badass heel. He has a back and forth feud with Henry, before eventually going over him cleanly and making him tap out. (heel/heel, I really don't care. Henry will be portrayed as a badass that takes on all comers, heel or face). After eventually going over Henry I'd love to see a proper Bryan/Orton feud.
Wade Barrett, who I've designated as a future WHC can entertain us all with a feud against Christian while Sheamus enjoys his reign as champion before Barrett comes in and takes his cookies.
Just some random ideas on feuds, but that's how I'd like to see the card structure. Oh and Johnny Ace would obviously wind up winning his power struggle with Long and becoming the SD GM
Oh and most importantly no more bull shit 10 minute Raw recaps wasting fucking time every week.