1) Cost - DIYers hate to spend money, only a select few will spend over $200 per driver. I really think the limiting cost is between $50 and $100 per driver.

2) Designs - Most DIYers are better at building then designing. They will take a well developed design, one that others have built and discussed, and tweak it to meet their goals. They really want a well documented and reviewed design for a driver before they are comfortable taking the plunge.

I do not believe there are many DIYers that will buy a new expensive driver if there are no "proven" designs available and a significant amount of positive feedback. Specific to the SEAS Exotic is the problem of it not being too efficient with too high of a Qts so the flea powered tube amp crowd is probably twice put off. I think that the SEAS Exotic is going to be a hard sell and probably not going to develop much of a following among DIYers. It may be a great driver but to me it seems like SEAS missed the target market with this driver.

All of the things you say about the SEAS Exotica are probably true, but in my opinion they will never gain a foothold with full range DIYers because of their cost, lack of proven enclosure designs, and the fact they are outside of the norm for high end full range drivers. I think SEAS would have been better off introducing a much lower cost version, chuck the Alnico magnet and expensive frame, and then issued the Exotica later as an upgrade.