I think I saw somewhere (probably here) that it was an issue of space. Not sure how big the PCB inside is in relation to the aluminum housing, but I'm guessing they would have had to make the whole unit larger or the screen smaller in order to accommodate 6.35mm jack. That's pretty much the only thing missing here in a premium product.Aside from the phantom clicks, the only flaw in my book is the sole 3.5mm jack. Kind of wish they went the extra mile there, since it's so much easier to adapt to 6.35mm than vice versa.