wibers
Premiere Elements 13/13.1 which was released in September 2014 has always used Bitrate Encoding VBR-1 Pass.
It is highly unlikely at this late date that Adobe will do a special update 13.2 to include a Bitrate Encoding VBR-2 Pass choice as well.
If history repeats itself, Adobe should be releasing a new version of the program in September October 2015. Only Adobe knows the new features and what will remain and what will be removed.
Please refer to the Adobe Feature Request Bug Report Form.
Feature Request/Bug Report Form
The Adobe Premiere Elements Forum in which you have posted is essentially a user to user forum. The frequency of the Adobe presence in this forum is undefined.
ATR