It is worth pointing out that the E-Tron regen paddles and brakes do exactly the same thing. I read that the physical brakes only apply if you have to brake at 3G+ which would be really hard. Where the paddles become handy is when you are coasting down a reasonably steep hill as they save you from applying constant brake pressure to regen.Any thoughts around the regen paddles equating to more power than pedal braking etc?
I find the Audi method far more intuitive and easier to master because it behaves just like a normal car. In the tunnel scenario you describe it would be best to gain some speed on the way down, then use the excess speed to coast on the way up.
After two weeks of E-Tron 50 ownership I have finally stopped worrying about regen, or range and just drive like I normally would. In the current weather my range was showing 178 miles at 100% charge and long term efficiency shows 2.7mi/kwh. I also tend to stick to speed limits or thereabouts (traffic permitting).
Only today my wife said "you drive this new car like you are out for a Sunday drive". Ironically I was driving like I normally did, I just reminded her you don't hear the engine so it "sounds" slow.