None of these people are really important with the exception of Francie. Of course, the only one who really didn't die out of all of these is Suit & Glasses, who I wouldn't be at all surprised to see again... In fact, I would think JJ would want him back for an epi to torture someone's mouth, in the future.
Emily Sloane - shot where? In the chest or back? I kinda forgot, but still, she was dead as dead can be.
The Real Francie - bullet in the middle of the forehead - no chance of coming back.
Diane Dixon - car bomb destroyed her body almost completely.
Danny - stabbed or shot? Forgot, but he had blood every where in the hot tub (the trauma dude from Color Blind killed him).
Haladki - BOOOM!!!!! Jack put a bullet in his stupid head - probably one of the most satisfying moments in the history of this show, and to me, probably THE most satisfying.
Of course, the old Alias will be back, very soon IMO.
Sloane will be bad again!