My biggest concern with it is that it is all surface mount parts, which means if something goes wrong, it is pretty much only serviceable by Shure or somebody really, REALLY good with a soldering pencil, tweezers, and possibly a magnifying glass. That's a pretty big negative for a device that is likely to get banged around a lot like a microphone, IMHO.
Also, IMHO, number of "my KSM died' posts we've seen in the last couple of weeks is in part caused by the use of surface mount parts.
- More prone to solder joint cracking near parts that get warm because the heat is not dissipated as well by the smaller packaging.
- More prone to complete solder joint failure (less solder = less material that has to crack).
- More likely to show solder dendrite shorts (dendrites can bridge the shorter distance between contacts faster).
With surface mount parts, there are a lot more things that are critical. Hole-thru parts have physical integrity guaranteed by physical contact between the pin and the hole. With SM parts, physical integrity is maintained by glue (holding the part to the board) and solder, making the strength of that glue and the composition of the solder critical to the product reliability. My guess is that Shure didn't get one of those right, and that one of the solder joints is failing under thermal stress.