We have DP RAW as it is a co-product of the DPAF sensor design and I hope it sees further development and adoption in the future. The 6DII is a lemon, RAW files from my 5DIV are substantially better than those from my old 5dIII to which the 6DII's sensor shares some charactaristics (off board ADC, low DR). The 5DIII is no lemon because it was released in 2012 but to selling that same technology in 2017 and today is just appalling.DPAF and DP-RAW are two totally different implementations using the "split" pixel wells on some Canon sensors. Only a very few top tier EOS cameras (5D IV, EOS R, and additional cameras to be named later) do DP-RAW. DPAF deals with AF while shooting video or stills, DP-RAW deals with two slightly different versions of the raw files for still images that can be adjusted after the fact.
Anyone who calls the 6D2 a "lemon" with an "undesirable" sensor has obviously never actually used one and is just parroting what the spec-sheet worshipping YouTubers say to get clicks.