I can personally say that downloading works much better for me now. So I’d recommend giving it another shot! I definitely agree that it was terrible and fully supported LTTs stance as of a few months ago, so maybe the Plex team decided to prioritize that…
You could always setup a Tdarr instance on another, powerful server (that you don’t have on all the time) that can crunch through everything to make sure it’s the right file type.