We're pretty confident thus far that we have flooded the index with about 15,000 low rank URLs all at once. This has happened once in the past a few years back but we didn't flood their index, they were newer pages at the time in which were low quality and could have been seen as spam since there was no real content but adsense so we removed them with a disallow in robots.
We are adding the meta no-index to all of these pages. You're saying we should remove the disallow in robots.txt so googlebot can crawl these pages and see the meta-noindex?
We are a very large site and we're crawled often. We're a PR7 site and MOZrank DA is 79/100. We have dropped from 82.
We're hoping these URLs will be removed quickly, I don't think there is a way of removing 15k links in GWMT without setting off flags also.