This is true. But if you compare it to the Model X which is about the same weight you'll still end up with the same conclusion - the battery/drive train of the e-Tron is not well engineered.
The base Model X probably has a 70/80 kWH battery - smaller, lighter and cheaper then the one in the e-Tron, and its supposed to be getting a 250 mile EPA rating.
The Model S is closer to 4600-4900 lbs. The Niro EV is about 3800 lbs.