I think the blues is fine for blues players, but free blues has never made much sense to me.
Derek BaileyFree improvisation, in addition to being a highly skilled musical craft, is open to use by almost anyone-beginners, children, and non-musicians. The skill and intellect required is whatever is available. Its accessibility to the performer is, in fact, something which appears to offend both its supporters and detractors....And as regards method, the improvisor employs the oldest in music-making...Mankind's first musical performance couldn't have been anything other than a free improvisation.
Derek BaileyDiversity is its most consistent characteristic....The characteristics of freely improvised music are established only by the sonic-musical identity of the person or persons playing it.
Derek Bailey