To address your second point as both a former journalist and current journalism prof... the media industry's been bleeding for years, especially when it comes to the print side. When the industry began seeing fewer advertising revenue dollars, copy-editors and proof-readers were the first to go because there was no immediate dollar value that could be placed on the work they did. I find it hard to fault journalists who are being asked to do more work and more writing with less resources and less time in which to do them when there are simple typos or grammatical flubs. It speaks to a sloppiness that has been brought on entirely due to the 24-hour news cycle, the importance of being first over being right, and the lack of funding that has come from the industry not being able to properly sell to its consumers that news costs money to produce.
Now, off of my soapbox, I agree that lawsuits are needed when accusing journalists of incorrect information or defaming information. This is an example of putting your money where your mouth is, the likes of which anyone screaming "fake news" and "alternate facts" isn't following through on. There's no such thing as "fake news" — there's news and there's libel. I'm interested in this specific suit because it makes me wonder how much of the information can ACTUALLY be proven by the writer vs. how much of this is a vanity lawsuit designed to get in the news cycle again. The presence of a retraction in the Sun leads me to believe that Melnyk may actually be in the right here, and have a legitimate case.
But again, I ask — where's the benefit here? At best, Melnyk wins the case and is $500,000 richer. But the prevailing belief is still that Melnyk is a shitheel, just not in this particular instance. It only serves to remind people about the whole Sens Foundation debacle in the first place. And at its worst, there's concrete evidence of some of the claims being made — enough to plant a seed of doubt into Melnyk's case. So as best as I can see, this is weird not because Melnyk is using his legal options, but because I don't really see a "win" condition here.