Kevin: Probably not BS, and sorry it's made you so angry. PB88123 has explained most of it, but I though I'd give you my idea of the discussion at TET; I imagine it's went like this.
/my_guess
"We want to be able to deliver in time for Christmas".
"Gee, we won't get delivery on all the different parts in time for Christmas".
"Well, we can probably ship most of the pre-orders just before New Years, but we won't have the battery we want in time, and we won't have the illuminated switches in time, and we won't have the titanium Cera in time".
"Maybe we should just tell customers that orders won't ship until sometime in early January".
"Boy, that's gonna piss off everyone, maybe there's some way we can make some of them happy, since we have most of the parts".
"What should we do about the people that ordered an illuminated switch? We could send them a standard switch, and tell them they can send back the standard switch when we take delivery of the illuminated switches, and we'll swap them out. Or they could just keep the standard switch, and we'll credit them the difference. Or they could decide they want both, and then just pay the cost for the standard switch (they've already paid for the illuminated switch, after all). Or they could just tell us to hold the order until the illuminated switches come in".
"What should we do about the batteries? Well, we have these alternative batteries that aren't quite as powerful, but they're still pretty good, and they heat up the Cera faster, even though they don't last quite as long. How 'bout we send out an extra battery, to make up for things. The two batteries we send have more power by far than the one 2900mAh, so that should make everyone happy. Or people could just tell us to hold their order until we get the 2900mAh batteries, or they could remove all the batteries they ordered and buy some 18650s they like from wherever they like. Lots of choices".
/end_my_guess
(btw, the battery deal works out pretty good for the vast majority, who only ordered one battery, but maybe makes less sense financially for those that ordered more than one battery. In those cases, I would just cancel all the batteries except one, make due with the two IMR batteries that came, and wait for the 2900mAh battery to come into stock.)
My point with all of this is that TET will do whatever you want, within limits of what is available and what's important to you. Why don't you figure out exactly what you want, within the limits of what they have right now, and see if they'll accommodate you. From the messages you left after the original one, I think you actually only ordered the illuminated switch, not both. If you really do want both switches, then you would not have to send your switch back, you'd just have to send TET the price of a standard switch and they'd send you the illuminated switch. (You already paid the cost of the illuminated switch in your original order).
And to answer your mix-and-match question, Noah also mentioned that TET would be selling titanium switches for those that ordered a titanium body, but that they (TET) wouldn't be selling/recommending mixing SS parts with Ti parts. I have no idea why, and if this is still ture, and didn't bother to ask...