https://arxiv.org/abs/1706.09883

which is a newer paper using the same imaging method (X-ray phase-contrast tomography) plus an algorithm to separate the rolled-up layers from the 3D scan data. Results are better, though still far from being able to decode substantial portions of text.

edit: I also found an article in Smithsonian Magazine from just last month, about someone else's even more recent attempts:

https://www.smithsonianmag.com/history/buried-ash-vesuvius-s...