Tiny defects are the nature of the beast when manufacturing at such quantities and such precision tolerances.
One gripe I've heard with some frequency is that the combo tool on a Bantam will collide with the blade's tip. Some consider this a design flaw. However, I place my thumb and forefinger over the combo tool's pin when closing it. I've never had a worry about marring the blade. I'll have a closer look at my 93mm models eventually, but truth be told, that mark on the tang isn't something I'd lose sleep over.
I doubt you'll see a redesign and retool or removal of all affected stock from retail. But I do agree that a sharp tip is desirable, and in some cases necessary.