I wondered about that two-handed operation as well.
I've got an ancient Radio Shack LED with a button on the barrel. It seems a lot more convenient than the rest of my flashlights with the buttons on the back end.
And if I may say so, I'd rather have a straight on-off rather than cycling through on dim, on bright, on disco flash, off again. I imagine if I'm in a tactical situation* if I want it on, I want it on, and if I want it off, I want it off right now, not two clicks later. I also think I prefer push-slide switches to buttons, but I'm not married to that idea.
Others may disagree, but disagreements are what make horse races.
I'm also curious about the 2 meter depth specification. Kind of odd, to my mind. Is that some kind of industry-wide official "Yeah, you can get it wet, but don't go diving with it" specification?
Terry
* Which I never was, but I think about these things.