One thing I've noticed playing with sample images is that the new AA filter allows more sharpening without the sharpening causing unnatural-looking artifacts. I don't think that the AA filter is actually sharper per se, but rather, it is more sharpening-friendly. Consequently, the DIGIC JPEG engine and DPP are probably sharpening R5 images more at the pixel level, by default.
I'll have to look take a closer look at that. I used my normal process and was too stunned by the resolution and colour, which I really like. I have read that some people had to pull sharpening back from what they were used to.