MEL'
In the US we have a group called the charting forum which is made up of FAA / Jepps and a whole lot of pilots groups including the military. They go over all of these sorts of things. It is not at all done in a vacumme. You have to remember that these missed approaches have to be written so that they can be flown with no radios. That stuff happens, as well as no radar. That happens too. Most of the folks here don't want to have all of the procedures show "fadar required" because that limits things for people when the radar isn't working correctly.
As to straight ahead to 5 DME. That works great if you have no other airports around or arrival complexes. There are a lot of busy places around the world where that just doesn't work well. You would basicly shut down another airport while approaches were going on since you have to protect for the missed approach. That just isn't acceptable to most folks...
Take care