Crystal clear. A stockpile of drivers isn't a bad thing unless storing them is a problem. At least you will be covered for any replacements in the future. You should accept this IMO.
As the doctor says accept the 9 spare drivers. Why is this even a question?
LOL I don't really think the screwed M22 sound too different from the others, but since I don't understand too much about speakers I thought, why not ask to the ones who do. So here I am.
I could speculate as to why Axiom is offering to also send the midrange divers but then that would be silly when you are already in contact with them and can just ask them for yourself.