While having to go to the immigration office to collect your "sticker" (I presume they mean stamp...) may make this feel semi-redundant, there are a few potential positives should this get rolled out to all visa offices for all visa types.
I'm assuming that VFS do the document checking when you submit the application. If there's anything missing or incorrect hopefully that can be rectified electronically, therefore avoiding multiple trips to the immigration office due to having incorrect documentation.
Additionally, if this is adopted at all offices, then it should be more difficult for rouge offices to deny applications made this way by requesting additional documentation, which is a problem some people on this forum seem to suffer.