Very short sectors?
Whilst it is an interesting academic discussion, in reality only people flying very short sectors are likely to be limited on a OEI missed approach. After all, you were able to meet the OEI departure requirements when you departed some time ago, you are now definitely below max LANDING weight (rather than MTOW), so even if you lose an engine it's not going to be a crisis.
Even our modest steed will make more than 10% climb gradients at typical landing W/A/T on one engine - in most cases it will even accelerate through flap retract speed whilst doing it.