I get where you are coming from, but sometimes kicking the can down the road is the only viable option. The fact that no-one else appears to have solved the problem yet speaks to the difficulties involved & with any such product development there comes a point where you have you stop and get shipping products to start getting a return on the investment.
I guess the only question is whether the concept of multiple material printing was oversold. I would say no more than any other product from pretty much any other company.