Thanks for the overlay. The s6330 occupies a volume of approximately 180ml(submerged it myself).I agree with you 100% there is a lot to be said for economy of size with lights. Where I think we do have a disconnect, is that the MiniMax is not that small.
I hope Selfbuilt doesn't mind, I overlaid roughly what the S6330 would look like over the minimax in red;
The head is about the same size yes, but the body of the light is much slimmer (having to only accommodate 3 batteries vs 4) and it's already longer than the S6330. An extra centimeter, or even 15mm of length will not make the light feel that much bigger, but could work to permit changing around the beam profile just a bit, to make it more usable at lower power levels.
Another point is a lights girth. The longer one walks with a light, the more noticeable the girth becomes in your hand. I am beginning to feel that for those wishing to do outdoor trekking, maybe a single or double 26650 light, with batteries positioned lengthwise, would be more comfortable over the long haul.