You should look into private trackers... I have the same setup for german content (there are no german trackers that have good seeds/content/moderation and api) but for english stuff torrents are still the king if you have the right trackers (ptp/btn/hdb and even 2nd and 3rd tier trackers are all fine). Any listed disadvantage doesn't exist with private trackers, and it doesn't even cost a cent - unlike usenet subscription and indexer.
Not only that, you also have to pay to see the source code even after registering (which is okay with the OSS licenses). Any paying customer cares to clone it to github and show us? Since it's MIT licensed there should be no problem.
There are still thousand other ways to get what you want. Usenet/Private Trackers/xdcc/FTP/OCH for example.
Filesharing will never die, but the easiest available ways will always be a target of the copyright cops.