I'm sympathetic to the frustration of someone who would alter their buying decision based on which package included track mode (or some other piece of information that has been dribbled out over time). But I also don't think the only culprit is "Tesla's lack of communication." Another possibility is that Tesla itself wasn't even sure what all features would be included when they started taking Performance/AWD orders.
Tesla has always been inclined to figure things out on the go, as opposed to planning things out to the Nth degree before moving forward. Another car company might have waited to release the Performance model until all of these things were figured out precisely (and therefore could be "communicated promptly and directly"), whereas Tesla rolls them out, gun blazing--they didn't even have the pricing figured out, as indicated by the subsequent, and significant, drop in price (no one complained about that one!). The upside is that Tesla moves faster, and customer get the Performance variant quicker; the downside is some negative customer sentiment from those that had to operate on assumptions that turned out to be incorrect.
I just don't think they are being purposefully cryptic and trying to tease out bits and pieces of information over time; rather, they are monitoring sales/demand and figuring things out in real time and making business decisions accordingly. But again, it's fine to take some issue with this strategy, and I sympathize with someone who is negatively impacted by it.
