Does this command sound natural: Replace all ocurrences of "r" with "ɹ" but do the replacement only in the phonetic transcriptions?

[Zoli]

Replace all ocurrences of "r" with "ɹ" but do the replacement only in the phonetic transcriptions.

 

[5jj]

It would be more straightforward as "Replace all occurrences of "r" in the phonetic transcriptions with "ɹ".

 

[Tdol]

Is there a sound reason to do this?

 

[5jj]

Well, the sounds represented by [r] and [ɹ] are different.