This crap happens all the time. I dont object but I find it silly to
A) Blame the defeat on the vassals of Austria who have yet to fight in France (I've got about 153.2 german vassals directly subject to me fighting in this war) and
B) edit the vassals out of the war.
Austria could have declined, although the prestige hit would hurt. He chose not to. That's how it goes senor. I've been called into many wars and whitepeaced with my vassals running amock.
That said, feel free to edit them out. Also, Ashalia I wrote you on msn, we can talk a bit during the week.