impact on application if converting to unicode

We are on Campus Solutions 9.0 using an Oracle 12 database.  We are considering converting the database to Unicode.  What are the impacts upon the Campus Solutions application?  I read in peoplebooks that the cobols, as delivered, are meant for a non-Unicode environment.  They need to be run through a conversion tool to expand the applicable working storage sizes.  It was also noted that cobol logic may need to be modified when it involves parsing a string field, as the size of the character may no longer be just 1 byte in length.  In-memory sorting within a cobol would not