I, with quite a delay, checked the changelog for 17.3.
And before updating I noticed the line I am referencing in the title.

ID Tag Processing DSP: 'delete all' and 'all except' actions are removed

Are these functions coming back someday?
Is there a way to update the program but keep the ID Tag Processing 'Module' for now?

I am kind of dependent on them, and would hate it if I have to stop at 17.2 forever.

I was however very happy to read this:

Bug fix: Music Converter: ID Tag processing was not being used for Multi-encoder

I hope these two things don't cancel each other out.