Re-read my post...if V1 or VR are predicated on 'BS' numbers then the decision to go or not go, should have happend about 3000 feet ago...
Again, go to your local airport, watch an airliner burn up 80-90% of the runway to get to VR and try to convince yourself that right before V1 or VR he would have had enough runway to stop.
Still not convinced...watch the Concorde video and ask yourself why it couldn't climb on half it's engines, if not 3/4.
Anyone in here hear of the 60/40 rule?
If V1<Vr there is no requirement and no need to be able to stop at Vr, so I don't understand your point.
If using balanced field, and reduced thrust/FLEX why fiddle the figures ?? You still have the performance to take more weight out of the field ??