Isn't that another fault as well, since it isn't a club with out a shaft. Would most casual golfers see that footnote?
Master "Forged vs. Cast" or "Blade vs. Game-Improvement" Iron Thread - Page 78
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If you get a chance, check this out:
Maltby published a book back in 2005, The Maltby Playability Factor, 287 pages. (ISBN = 978-0927956123). In it, he describes the history of golf club design - especially irons. The book contains full-color engineering drawings of irons from the different eras, comparing their physical features. Also, it gives the MPF data lines for hundreds of models of golf irons, plus their end ratings.
The book details how the MPF is calculated. I can tell you're really interested in club design, so I thought you might find it interesting. I was lucky - found three copies on clearance a couple of years back, and bought them all for $1 each.
Here's an Amazon link for details.
If you don't want to buy a copy, you might be able to borrow one from a local clubsmith.