Hi there. We actually did post all the original lossless recordings, including all the ProTools files.
As for the mistakes, they are definitely in there. I wouldnt not call the recordings poor overall, but they do vary. What's important to me is
1) These are the first recordings every released into the world unencumbered by copyright restrictions
2) They are overall excellent performances. I would even argue many could be held up to some of the most notable orchestras
Quality is ultimately subjective, so we have to realize part of this is legitimate mistakes, and a large part is also people just preferring recordings they already know, other halls, conductors etc.
Regardless, given the ratio of money/ hours of music we got, the quality is pretty good considering.