Voted none of the above, because I think it's potentially genius, but it's a tough row to hoe:
This event was meant to forestall SUV purchasers from going to other brands, shore up investor sentiment, and avoid cannibalising Model 3 sales. That's why they chose the specific details they chose to mention: 300 miles range, 7 passenger, 66cuft. Captures the interest of SUV shoppers but it's worse than the 3 in many ways.
Ok that all makes sense, but I think there's more:
They also now have multiple paths forward depending on ongoing Model 3 demand vs Model Y demand. If demand for the 3 flags, they could probably shift an existing line to Y production exactly as demoed without much trouble. Model Y buyers will be happy, revenue will be steady. Meanwhile they will be furiously building new factories that will build both 3 and Y with the new wiring loom, 12v battery delete and probably slightly higher range. If Model 3 demand remains strong they'll announce the upgrades at the same time they start building the Y, and everyone will be pumped for the bonuses.
It's a strong business move, covered up with Musk's awkward presentation style.