We take time out from building new functionality nearly every day to report straightforward issues back to our metadata providers. They generally fix them within a day or two when the error is clear cut and there isn’t a lot of research involved. It then takes a few days to a few weeks for the changes to be ingested into our system, and sent down to the specific album in your collection.
When some issues are traced to our own systems (like artist equivalence, for example), we also fix those by hand, when they’re straightforward.
What we generally don’t do is take time away from building all this infrastructure in order to enter data by hand. It’s just a really poor use of our resources as a team, and we all get a lot more bang for the buck when our team is making improvements that fix hundreds (or thousands, or hundreds of thousands) of errors, as opposed to fixing them one-by-one ourselves.
There’s not much I can say with regards to timelines. In all likelihood, error submission will happen in app, not in some kind of data entry tool. For now I would recommend using all the extensive editing tools we’ve released over the last few months to fix any errors you see, report issues when you see them, and be patient as we continue building new tools, adding new metadata sources, and improving our metadata cloud and infrastructure. I expect that process to be fully complete… never 