Having the two fued wouldn't be the best move if they hold plans to team them up. If they want to fued the two, yet still team them, the best choice would be to team them up from the get-go. Then, later down the road, start some desention, or just have one turn on the other.
But... they need Teams on Smackdown (which is definitely where Jeff & Matt will go/stay, since Matt has a history with Edge who is on Raw, and Trips dislikes Jeff... so) because the only teams around ATM are London/Kendrick, The Pitbulls (though their off TV for a while do to suspensions, and may not return as a team) and other then that, not really anything else now that they split the alliance between Regal & Finlay. There is of coarse the team of Funaki & Scotty, but who are we kidding?