4 dogs/A37575......Completely agree.
If the 'MAYDAY first' school (of which there are many) doesn't like the definition which is 100% clear, then (internationally) redefine it. Otherwise, using MAYDAY for less than MAYDAY (as per) definition devalues its meaning.
An twin-engined aircraft that is certified to operate on 1 engine, unless there are additional threatening circumstances, is not 'threatened by serious and/or imminent danger'. It's a PAN, IMHO
I