OK, Here is the scenario.
Site A created some content about a topic.
1000 "useful" articles.
They did lots of HARO link-building and got some great rankings.
Then Google said. "Wait a minute... your site content... is not good. People really don't value it."
All rankings gone. I'm talking, 100,000 a month in traffic, down to 0.
I've done a backlink check, overall, no pattern of link buying, and even the Haro sites are not selling links. Links, is not the problem. Its a content quality problem.
Now, I have no problem solving the content quality issue... but... I am curious whether Google will go.
"OK, you now deserve those links, your content is great. Good job. Here is your rankings back." or..
"OK, good job, nice content... but you got those links when your content was terrible, so I can't trust them. You are fine to proceed, but it's Ground Zero for your links, I will not value your historical links."
Seeking anyone with data, not just a hypothesis.
No lectures on what should have been done. I'm the new guy, not the original.