Now here I disagree with you. Many of the fringe things they created (like changing the style of mounting, the surround, etc) are unnecessary. The big advantages of the W7 are it's linear BL (easily achievable with a little machining of the pole piece and careful design of the gap), relatively linear suspension (easy to test with a few different progressive spiders), and it's low inductance considering the Xmax (which they achieved by limiting it to a 2 layer voice coil instead of a 4 layer).
There are a large number of drivers that have achieved these feats and better at lower costs. I love the W7, but it's not an incredible break through in technology in terms of the value the patents JL Audio holds.