Giulio Calisse does mention that you can add grain, just be aware that it doesn't change pr. frame basis in the same way that Film Convert does it.
Without having tested it excessively it does seem to be faster to export it as a "Photoshop Image Sequence" instead of "Adobe Media Encoder" Depending on you workflow this might add another step on top. You will benefit from having better compression (i.e exporting a .tiff sequence)
The ACR engine is implemented in AE if you import Cinema DNG files, so it should, in theory, be possible to make a script that would enable the ACR engine for use with other formats than raw. As for better support in PS an option to render via the Adobe Media Encoder app doesn't seem like a lot of work.