According to the shooting script for the final episode:-
"BEN
Can you forgive me, Will? After all I've done to you?
Forgive me. Please forgive me.
Ben steps to him, as if to embrace. Hayward grabs Ben by the lapels, forces him from the room. Chaos follows.
EILEEN
Will!
HAYWARD
Leave my family alone!!
DONNA
DADDY!
Hayward shoves Ben toward the door. Ben reaches a hand toward Donna, desperate, as if her shout was meant for him. Ben falls, STRIKES his head on a coffee table. Donna SCREAMS. Hayward kneels beside him.
HAYWARD
Oh, Lord...
(beat)
Donna, get my bag.
(she stands still, in shock)
DONNA!!
Donna takes one last look at Ben, the pool of blood forming beneath his head. And races from the room. Eileen wheels closer, pales. Hayward kneels an prays.
HAYWARD
I'm sorry, Ben. My God I'm sorry. Ben, Ben can you hear
me...?
HOLD ON Ben's face for a beat. Silent."
Sorry, i'm not sure how to do the quoting thing. Curse my lack of technological prowess. Anywhoo, it seems that Dr. Hayward instantly regrets his actions. Personally, i agree with the prediction that Ben would've survived but reverted back to his previous way of life vis-a-vis Nadine.