Lute tablature is just a map of the instrument and it tells you where to put you fingers and a single line of notes (called flags) provide the rhythm. Doesn't avoid needing to be able to play the thing!Sure why not? Points 1 to 5 would not exclude learning your scales, taking a bit of coaching on phrasing, a bit of advice on what goes with what, and Dick's yer uncle Bob, you know a bit about improvising. The rest is up to practice. Much the same as any other way of doing it.
I know a method for guitar where you dont have to know a single scale, just where to find the 1-3-5 of the major triad in three different patterns. You can find any note you want from this, just like learning the scales. It works but its better to learn the music, you will have learned so much more at no extra cost.
Just my thoughts,
A couple things worth mentioning:
Talk about truth in advertising. He's not kidding when he says that you'll be "Improvising for Real", because you sure as heck won't know what you're doing. ))
That raises the question, does one need to know what one is doing when improvising. Always used the "Let yourself go" method, as otherwise it is likely to be rigid. Someone once said, "Laws are for the guidance of the wise and the absolute obedience of idiots."
I cannot see any plus points in learning anything other than conventional music theory. There is no short cut just alternative ways.
And any other way is learning something that will place limits on you.
Appen you are right, but is there any need for a prelim course to music theory? Is there a prelim course for reading and writing? I guess the alphabet, but its part of the same thing. Where else would you begin? You got to start somewhere, that's a fact.
Getting back to the OP's original question, my guess is the answer is "no".
My point is that opinions by those who have not actually read the new improvising method book are merely speculations based upon one's own knowledge and past experience. While these opinions may hold some validity, they are no substitute for first hand experience with the method itself. Should we draw straws to see who buys it and writes a "scholarly" review based upon what is actually contained in the method?
You forgot to mention that two non key related systems are still in use, tonic so fa and American shape notes.
Is it possible to improvise using these and what does that prove?