Christian; in terms of speed, yeah it would likely be faster to get Eureka (or someone) to do the bits.
YPU: I too would prefer plastics. And yes, theoretically there is a chance that WF could produce something like this in the future, probably along the lines of the mini-sprue boxed sets I suggested earlier. It seems the only feasable way to get 'VSF Adventurers' which is more or less what this is.
The Beast: I thought long and hard before I signed up for various sprues. What if they turned out not to be what I was after and I felt I should take them? What if I didn't take them - would I have let WF down? I realised that wasn't what WF wanted though. They don't want people to agree to take sprues (well, obviously they do, but not at this stage!) - they want people to tell them what are good ideas and what aren't! So if you think it's a good idea, my recommendation would be to sign up for it.