I've considered adding a torrent download, because it includes built-in verification of the download. A common problem is users reporting that their download over HTTP is corrupt, but I'm not sure if they'd be able or want to use Bittorrent.
(Also, for many users the download is probably fine, but they can't open it in Excel. Bittorrent won't help that. )
I'd expect your users to be willing to set up a torrent client. It's not even difficult.
The few times I've published files over bittorrent I've had to reassure people that torrenting itself isn't any more illegal than other download methods.
It's also not clear ahead of time how difficult it's going to be.
If torrenting is the only way, some people won't bother.
Bandwidth is no problem for us, we have a faster connection than all the users. Users in Africa and Latin America would probably benefit most, but I'd need to research whether they'd be prepared to use Bittorrent before implementing this.