I kind a want to throw in my hat about this-though my view should always be taken as colored by my ignorance as a fairly new practitioner and scholar of the art. to sort of bring it back to Myles point, we all know that the 5 secret strikes are the main to do in the text, but my conjecture is to why, and why did high master JL decide that they needed to be taught. So my thinking goes like this, at the end of the 14th century beginning of the 15th it was fully expected that everyone capable of wielding a sword should know how to fence to the 4 openings. Much like in america today, basically everyone grows up and is instilled with the knowledge of how to stand and swing a baseball bat. this is why I think that long and short edge oberhau's and unterhau's are not really commented on accept to say how to step with strikes etc. because anyone who was anyone knew how to do that stuff and also how to defend themselves basically. What Lichtenauer (or whom ever is doing the gloss) is telling us is that yes a diagonal oberhau might be a bad peasant strike and it is probably going to be the first thing that someone who hasn't studied will throw at you (how many of us with new students know this first hand). so what is going on with the master cuts, is JL is letting us all know what the most effective and efficient way to deal with these strikes are. I.E. someone throws an oberhau at you, cut the Sh*t, stop it with your own, and then just to punish them for underestimating your skill, go ahead and stab them in the face. Or just to make it more painfully obvious what a skilled swordsman you are, why dont you just stop it in mid swing and then using his own energy, cut around his sword with your short edge and hit him in the temple.
back to part of the original question. the basics aren't covered, IMHO, in the early manuals because it was assumed that everyone came to a JLT school or master knowing how to throw cuts to the 4 openings and defend themselves against people of lesser skill.
however when you get down the line a hundred years or so, manuals start to give detailed descriptions of how one should throw these cuts, step with them and make sure that you know this before you start on zorn ort or zwerch
like i said only my observation and opinion,
