I don't get the standards issue you are referring to. The instructor can specify what is acceptable for their class: PDC or tables. The student has to "safely plan" or they don't pass. It's pretty cut and dried.Its not a quibble when you say that you can fail someone for not being able to use Altitude tables and yet the standards allow the diver to use something else.
You can't have it both ways.
Like Diver0001
Its a standards issue, but you will blame the instructor.