I found the standard regen breaking way too sharp, as I stopped waaaay short of the T-junction so that got put thraight to 'low' again
Stick with it! It's like if you've ever tried to brake with your left foot ... very odd ... you just haven't fully adapted yet. Even at the higher setting (Standard) the regen is as gentle as you make it. You feather oh so gently back on the pedal. Initial adapting comes fairly quickly but it may take a little longer to get the finesse that allows you fully exploit the delights of brakeless braking! We have driven for years just lifting straight off the accelerator so it's ingrained. (Actually it's a bit like on a motorbike because the relative amount of engine braking gives a similar effect ... nobody just lets go of the throttle on a bike, you actively roll it back either slow or fast.)