anyone able to download it?

Yep

..."Audio quality not best"... does this release have the hard coded Polish subs during the singing parts?

“Audio quality not best” - aka sounds like you recorded as the audio played through computer speakers. Yes the hardcoded Polish is there @Trog

@SalsaEgg yep, I had a feeling that was going to be the case - due to the fact several of the anime sites have upped this particular English dubbed version already ... the audio appears quite good as regards a "first" English Audio release, except for the distraction of the Polski subs during singing etc. , we'll have to be content with this edition until the HQ web and BluRay rips are available ... AND not to forget - Thank you to the Uploader for this First Dubbed Release. ;)

Audio is actually sourced from billbill: https://www.bilibili.tv/en/video/2009697781 Just placed on a higher quality video. Credit the billbill uploader instead, check the date it was uploaded before.