Firstly, for me too it is STOP below V1, no questions.
That out of the way, then, at V1/V1+ the problem is that we have 'grown up' to treat an engine fire in a calm, collected fashion, climbing on the OEI procedure, cleaning up and doing the drills/ c. crew brief etc, because we are taught that an engine fire is not 'life treatening'. Unlike some military a/c I have flown where an engine fire could burn through the flight controls PDQ, the emphasis is on measured response. The thought of someone not trained to actually FLY the aircraft at lowish levels in a hurried pattern gives me the shudders, and could well result in an overbank or CFIT, and in marginal weather............................
Is it indeed time, as hinted here, to swing sim training more to this scenario? Obvious problems with sim visuals etc, but maybe we could practice the old military type short pattern procedure, say at 1000'?
We'd certainly get throught the sim detail quicker