I can understand the outrage but it seems a bit narrow minded.
The vaping industry, while in the billions, is made up of many small companies with a few large ones. VS is not one of the larger companies and they have a niche product. Can they do things better? Most definitely. From what I've seen, they seem to be doing the best they can and I'm sure they'll learn from their mis-steps but to expect the level of professionalism and CS of a bigger company is a bit silly. They're talking about 500 devices on the first shipment, not thousands. They're not that big. If you can't/won't wait for these delays, you can buy a number of other DNA 40 devices like you said.
I am interested in how they'll handle the early sales of rDNA 30 skins bought by perspective rDNA 40 owners. From what I've seen on their facebook page, I think they'll do the right thing and swap them out or give refunds. I don't agree with them using facebook as a medium to connect to their customers (again, what a small company would do) but it's better than nothing. Yes, they should've e-mailed people that pre-ordered to update them but mass e-mailings are not as simple as going to an e-mail client and sending out an e-mail, especially hundreds or thousands.
Getting angry and having a mob mentality about this is really silly. Get over it and have some patience.