Beaing in mind what happened to the E3 in Alaska, where the ac hit birds on t/o and the crew continued as per SOP and subsequently crashed, maybe the V1 range should be calculated as an aid to the captains decision-making process.
I'm not sure how this incident ties in to the thread subject.
According to the CVR these guys were long long past V1 and at Vr when they struck the birds.