The DPDD has long had an intentionally-vague description of how DM will perform shape measurement for weak gravitational lensing, which is a very big piece of our cosmological science pillar. The state of the art has changed substantially since construction began, just as we expected it would.
Those plans can now be made much more concrete, and in collaboration beckermr and Erin Sheldon (of DESC, Rubin commissioning, and the Dark Energy Survey) we've put together a proposal to adopt their "metadetection" approach.
The draft changes to the DPDD can be found on this PR, while the rendered PDF can be found here. As a change to a document with project-level change control, this is just the first step towards an LCR.