FWIW, I fly offshore, so 99% of the time over hostile territory. Give me twins every time. I have not yet had an inflight shutdown, but have had the chip warning come on over the water in IMC and it is a very calming effect to know there is a second donk running independently.
I'm sure a case could be made to allow more SE, then again a case could and should be made for proper training all around, including twins. That would drastically reduce the accident rate in my not so humble opinion.