Kaif is our future skipper. He is a very consistant style batsman, one of the few grinders (Ala Dravid) and can handle bowler-friendly tracks. He should stay, he has barely played at all!
Raina is in bad form, and carrying him to the WC is not good.
Laxman won't fit into the ODI team. Can't slog (Even Kaif can), needs quick pacy pitches and outfields, and can't pinch quick singles. Is a class act, yes, but in ODIs you don't get 50 balls to settle in. Dada, however, is more suited to OD games due to his power hitting abilities, and his useful seam up. He fielded rather well in the few games before he was dropped too. His one 'amazing' catch was initially a scree up, a misjudgement, but he still managed to hold on. He is aggressive, and keeps the team spirit up. Also not afraid to give it as good as he gets in terms of sledging. How many players in our current lineup can boast that??