The summary for this is inaccurate, but the article is one of the best articles I have seen thus far explaining the issues. But even then, the article has a few mistakes (albeit minor ones).
When ghost heat was first introduced, nobody knew what it was supposed to solve. It didn't affect the dominate meta at the time at all (2 PPC 1 gauss) and only screwed over gimmick builds, canon builds, and legit builds. It was only much later that we got confirmation that it was designed to "fix" boating, which was never even a problem.
#savemwo was started around this time because the sniping meta had existed for over 6 months by this time. Everybody thought ghost heat was the attempted fix, so when it turned out to not do anything at all, many of the competitive groups started doing letter writing campaigns to the publisher. A group of players didn't think that writing the publisher would be effective, so #savemwo was started.
By the way, PGI finally came up with a game plan to solve the sniping meta. It is called ghost delay and doesn't solve anything