I believe vapor blasting does remove (some, or all of) the chrome, and leaves a textured tip. It's best to get drivers that do not have chromed tips, since the chrome will flake off, which has a tiny, but critical effect on the fit of the driver to the screw. This goes for Phillips, Torx, etc. as well.
There are three styles of screwdrivers for slotted screws:
Keystone has the tip that widens at the end, like a chisel. They are sometimes called Mechanic's screwdrivers. The tips are basically squished and trimmed, and then ground (if they are good ones). When properly made, they are usually the strongest of the three, and can handle abuse, like prying, etc. The really strong ones have the shank (rod) go all the way through the handle so they can be tapped, etc. Some have round shanks, some have square, which in most cases is stronger. These are a great choice for bigger drivers.
Cabinet or Electricians drivers have a blade that does not widen. They may be made the same way as Keystone drivers, but the sides are ground down (Klein does this), or the taper is simply machined down from the rod (Ideal does this). These should have a longer taper, for a more parallel fit. They are generally meant to be used ONLY as a screwdriver. They can't take much abuse. The benefit is that these can reach screws that are recessed deep in holes, or in crowded spots.
The last kind is Hollow Ground. These are machined to curve inward on each side, and well-made ones are parallel at the tip, so they perfectly fit the screws. These are popular among Gunsmiths, watchmakers, or anyone else who needs a precise fit, since loose fitting drivers will damage screws. These are not meant to be used for anything other than driving screws. Most inset bits are hollow ground.
Tekton is most likely sourcing the blades from another OEM, such as Ideal or some other company. There are not many US companies that make driver shanks. Probably in the single digits, and only two or three that make them in large volume. So they may not have much choice if they want these to be USA made. Personally, I think they should go with Hollow Ground tips, and offer some "demolition" drivers with the Keystone tip and striking cap, since those have become pretty popular in the last ten years or so. But again, they are probably limited to what they can get.