After installing P5A003 for SAS Enterprise Guide 8.6, opening a SAS Viya library (especially libraries containing thousands of datasets) used to take several minutes to several tens of minutes.
However, it can now be opened quickly from:
Servers ⇒ SAS Viya Server ⇒ Libraries ⇒ Dataset.
On the other hand, since only up to the default limit of 500 datasets are displayed, when clicking the "Browse" button, no datasets that should originally be displayed appear in the "Open File" dialog.

In addition, it has become impossible to open all libraries directly from the "Open File" dialog as well.
※ I am accessing BigQuery data via SAS Viya.