most people I know use the torch on their phone as they have the phone anyway all the time, the light is often bright enough for seeing your feet.
However I think the gap is when phone is flat. So you're likely holding the battery with phone recharging it enough to use a flat phone AND wanting a bright enough torch. So the gap is say a flat Slim 5000 type form factor, with a torch. In the past the torches on batteries have been so weak they only were useful in dark-adjusted vision short distance situations. When we were advocating a combined battery with torch it was a better torch.
That Slim 5000 form factor does help solve the having all 3 items presented of power in port, power out port, torch. The rounder form factor like the LC40 or Powercore+ Mini is easier to hold as torch by itself but it creates the design problem of fitting the power in and power out in the small surface area at the end.