The Model S roll out and Model X roll out will be very different. With the Model S, Tesla could take their time and ramped slowly as everyone expected. For the Model X, it has to happen fast or they will badly miss 2016 projections. The hype machine should be running full force as far in advance as possible to help drive that demand. Instead we haven't heard anything official from TM on the X at all.
When I offer that the only valid business reasons are they are worried about impact of S demand, or they simply aren't ready (thus telegraphing yet another delay) I'm the one that's labeled crazy.
Maybe the X will be so utterly ground breaking that it won't need any marketing and Tesla can sell as many as they can make for the foreseeable future. I guess I hope that's the case as well...
I tend to agree with you on most points. However, Tesla could not "take their time" with the Model-S roll-out. They had to get them out fast due to financial reasons, which is why there were so many "bugs" in the first models. I feel that now the opposite is true and they are taking their time on the Model-X in order to get it right and to prevent costly repairs after-the-fact. Its more efficient and cost-effective to ship a good-working car than to have to do a recall or repair it after delivery. Elon doesn't appear to be too concerned about missing projections or the short-term value of TSLA stock.
But I certainly agree with you on all remaining points regarding reasons for the silence. IMHO, the biggest is reason is impacting S sales, since that is currently their only source of revenue right now. They need to keep it as healthy as possible. With regards to delays, I don't necessarily think the vehicle is delayed, but rather the high-volume production will be delayed. I think the delays moving forward now will be with the production line and it certainly appears to be delayed again since it doesn't sound like they're going to do significant ramping up until possibly Jan 2016.
And I do think that the Model-X will be ground-breaking and generate a lot of buzz so that they don't need to do too much marketing when its revealed. Let the journalist/media take care of that. The smart decision is to re-evaluate their marketing stance once they have caught up on Model-X backlog, which might not happen until the end of 2016 (I'm including foreign markets here).