Much ado about nothing, I think.
The new KJ updates look great - and as a current KJ owner, I have no reason to expect they would give me those updates. I don't understand why anyone feels that way. The firebox and top vent will be available and KJ users will get them sooner or later anyway - I'm sure you'll be able to buy one. Or, you can just wait until your current FB cracks or your top vent peels and get new ones. Top vent is not covered in the current lifetime warranty, though, so you might need to buy that one if you want it. It's mostly a cosmetic update anyway.
The hinge is a different issue, it required a change in the body. Less likely, but old users can get the upgrade if their shell cracks.
If I were in kamado-buying mode, I would have done research. That research should have easily lead me to the fact that KJ was planning big updates on their next model year. Then I would have had to make the choice to buy now or wait. If I bought now, there is no way I would have expected to get the old model essentially replaced by the new one when it came out.
Now, if they stopped replacing fireboxes for legacy users, that would be a different story. That would be something to be angry about.
I am also not reading the same into Bobby's messaging that the KJ will be like the iPhone where users will need to buy a new one every year. The message I get is that he feels they should not be satisfied with trying to stick to the status quo. Sometimes, upgrading parts will be easily backwards compatible. Sometimes they won't. I don't see it as a "Sorry for your luck" message. I thought is 'Craigslist' trade-in program was a joke... and I thought it was funny.
I'm not sure why they felt they had to put tiles on one as a test, but it sounds like they aren't moving forward (and sounds like they never had plans of even moving forward) - so, this could actually help KK. Someone seeing that tiled KJ might think, "Wow, I love the tiled look". Do a Google search for 'tiled kamado' and see where they are likely to browse.