I've never seen a set like that either.
You shouldn't be able to feel legends with doubleshot caps at all (or dyesub, for that matter). Laser etching physically etches the legend into the key, leaving a groove. Some lasered caps are infilled, but usually not to perfect alignment. Pad printed legends can also result in the legend being elevated, such that the user can feel it. With doubleshot legends, the key is moulded around the legend, and if it's done well, there should be no inconsistencies or voids.
Note that the blackbird's stock caps aren't considered by all to be of high quality. I'd definitely consider them to be above most stock caps due to not being pad printed, but that doesn't mean aftermarket sets wouldn't be better still.