While not at all questioning Morris' qualifications as a photographer, my guess would be that; like a lot of people, he's struggling somewhat with Adobe's 2012 Process Version.
DPP has its own advantage for sure, I'd assume that Canon's DLO is supposed to be tuned by Canon itself for example to do proper deblurring taking into account the how deblurring parameters shall vary across the image field based on the distance from the center of the frame for a particular lens model / camera model combo... something like DxO does too, except DxO tests and Canon can just use the data from their optical CAD system.