I second this. It seems like this would be an undeniable flaw regardless of opinions of the other points. I'm sure there are simple fixes, but it seems a lot of the issue with compromising is the effort it would take. Plus, Nether travel would be that much more dangerous to boot.
Perhaps an easier compromise would be to alter the frequency at which mobs spawn, so while they may be more difficult, they are also fewer. I don't know if it is easily done, but to me it seems the simplest compromise.