1) No, you need a Convenience Package on Premium. Most E-tron's on the lot have active lane assist. MSRP of this is $70K with $15K discount easily in SF Bay Area.
3) Frunk is small because there's a jack underneath. Yes, E-tron comes with a spare tire, a rarity these days but great for peace...
In terms of range, yes. But e-tron has the same size battery as a Mach-E ER. Audi took tradeoffs that worsen its efficiency, but they lead to a better ride quality (higher stance, air suspension, wider tires), premium interior that increases weight, faster charge rate, 400HP/500ft-lb. Similar...
The quality and price of e-tron are really compelling. I cancelled my Mach-E order and purchased a Premium E-Tron with Comfort package (black optic, adaptive cruise control etc) and towing package for less than Mache-4X Premium. This is in CA Bay Area and with cash.