What the bulletin means is that the files of appeal allowed cases will first be sent to a Case Processing Pilot office in Ottawa, rather than going to CBSA to be sent back to the visa office which first rejected the case.
When the case file goes to CPP-O, a file will be created in the new Global Case Management System (GCMS) which will be accessible to the visa office. In the case of some applications (considered low risk), the applications will be processed to completion at this office in Ottawa, and the visa office will only be responsible only for printing the visa and the confirmation of permanent residence record. In other words, some cases which are allowed on appeal will not go back to the visa office for processing to be completed, that will be done in Ottawa and the visa office will be directed to issue the visa.
In the case of high risk cases (where grounds for inadmissibility for security and other concerns might still exist), after the file goes to Ottawa and is added to GCMS, processing will be completed by the visa office.
In short:
1) All appeal allowed files go to CPP-O.
2) Processing of files deemed low risk completed at CPP-O, visa and COPR issued by visa office.
3) Files deemed high risk sent back to visa office to be completed, visa and COPR issued by visa office if successful.