They may be unwilling because of pressure from traditionalists. A few years ago JH made reference to a newer bridge design. Whether it will ever be introduced on one of the traditional style models is anyone's guess.
I think organizational arrogance, driven down deep from the top, precludes them from doing anything progressive or responsive. In many other businesses, this would end in corporate suicide. Fortunately for RIC, they offer enough of an alternative to other guitar makers that customers grudgingly accept their products in spite of needed improvements.