I wonder though: from the few reviews I've looked at, it seems that the main complaint is that the cable does not identify itself as a legacy connector, and can result in the device drawing too much power from the port, potentially damaging whatever is on the other end.
Definitely an unfortunate result, BUT: I wonder, is it still a common concern when the device on the other end is (for example) a wall plug-to-USB connector? Because if it's not too much of an issue in that case, and the device on the USB-C end is not at risk, wouldn't a non-compliant cable result in faster charging?
In the second case the wall wart started charging my Nexus 6 REALLY FAST on one port and the other port has gone dead. I haven't had a chance to check it out with a volt meter, but I suspect it's now putting out substantially more than 5V on one port, and substantially less than 5V on the other. Fortunately the N6 supports Quick Charge 2.0, so as long as the voltage wasn't more than 9V, it probably didn't do any real harm to the phone (although it was actually charging faster than my normal QC charger). But since I also noticed the phone getting really hot, I've stopped using that charger, and it doesn't look like I've significantly damaged the N6 batteries. At least, the battery life hasn't been compromised and it hasn't burst into flames. Yet. :-)