Bill, I don't think there's any point whatever in contacting Tamiya. Those people know what they did.
What really irked me was that the Yorktown was released in the middle of a spate of genuinely revised kits, like the Yamato, and genuinely new ones, like the Missouri, that duplicated, and tremendously improved on, old Fujimi 1/700 kits from the seventies. I assumed the Yorktown was going to be a completely new kit that would fix all the mistakes in the old Enterprise and Hornet. No such luck.
For the record, the "new" Yorktown kit has one genuinely new part: the windbreak at the front of the island. And it has some nice new TBDs (which none of the old Waterline Series consortium kits had). The other aircraft in it are F4Fs and SBDs. I haven't compared them to the ones that Fujimi used to make, but they're new to Tamiya.
I don't think Tamiya's professional ethics are any different from those of other manufacturers. They pulled similar stunts with their 1/350 American and German battleships. Forty-year-old kits packaged in shiny new boxes at substantially higher prices - while they were releasing a spectacular brand new Yamato.
Caveat emptor, I guess.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.