There are two features available in Private Pair, which are no longer available in Patent Center.
The first one is in the search options, where it's no longer possible to search by docket number. This was useful, for example, when the system did not immediately find via application number.
The second feature was when selecting to download a PDF. In Private Pair it is possible to open the document without first saving. This is a nuisance because it no longer alows me to save directly in our internal repository, resulting in additional time-consuming actions.