The poor stall characteristics of a plain swept wing often necessitates the use of features such as washout, flow fences, slats and leading edge flaps to modify the stall pattern.
Indeed so, Swanie, the devil is certainly in the details.
Basic theory is one thing, the finished product quite another.
Washout (for example) has been used for many many years on a variety of aeroplanes, both straight wing and swept designs.
The DC-4, DC-6, and DC-7 aircraft all used the same basic wing (airfoil) design, the most significant change between the types (besides structural) was washout.