This is not a wise decision I think. There are lot's of user like me have the same problem, the WAV files are tagged but Directory Opus doesn't support. this is so much hard to convert all of WAV Collection into FLAC then tag again. Even Windows file Explorer support the Tag for WAV. Directory Opus is far far better file manager then Windows file explorer but that's not support WAV Tag 
that's not we expect from the best file manager software as Directory Opus