I bought balls from an Aliexpress vendor and DHS says they have improved the material they use. Fortunately I only bought 6 of them.
The weight was an average of 2.76 grams with small variance. This is identical to XSF and Butterfly G40+, a little more than Nittaku Premium 40+. This would meet the strict ITTF standards that come into effect this January. It is an improvement over previous DHS balls, which were always over 2.80 and would not be approved after January. The balls have a nice bright white color, a rough surface and they seem round.
Beyond that I have nothing good to say about these balls. The bounce height is still very low, in fact identical to a Joola 40+ ball from June of 2014 (which was made by Shanghai DHS factory). In play this is obvious. The balls stays low, dips a lot, doesn't come out which makes play at middle distance difficult, and there were occasional weirdly low bounces. In short, most of the things we have complained about regarding playability of Chinese seamed balls from the start are still a problem, even with the latest version of the balls from this company. Maybe these new ones will turn out to be more durable, but they still suck. And since they suck, I don't plan to use them, so I don't think I will be the one to figure out if they are durable.
I implore tournament directors, league officials and club managers, please don't use these crappy balls. Why impose terrible balls on players when there are at least three different types of decent balls available (seamless, Nittaku Premium, Butterfly G40+). If price is an issue, go with seamless.