Jon, i do appreciate for clear view on that great APEX 222 feature! But would You clarify APEX Advisor of that? I mean that Advisor don't like any new Dynamic region...
Region Source (Identifies the source of the region, reference Region Source Type)
Check Is Valid SQL or PL/SQL Code
Category Error
Message
Compilation error - ORA-06550: line 33, column 3:
PLS-00372: In a procedure, RETURN statement cannot contain an expression