What you are in fact talking about, are Google's death stars like the Shopping box, Knowledge Graph etc. It's fully understandable why many SEOs can't stand them 'cause whole categories of websites (price comparison platforms, for instance) have already fallen victim of such death stars, and there will be certainly numerous other portals, which will lose almost all of their traffic in the near future. Despite your (quite good) suggestions on how to circumvent such an issue, the situation for such an endangered portal can be hopeless when it's its whole business model, which a new Google feature makes obsolete. See geizhals.at for a very famous example.
If both page are closely related (lots of topical overlap), I would merge the unique content from the lower ranking article into the top ranking one, then 301 redirect the lower performing article into the top ranking one. This will make the canonical version more relevant, and give it an immediate authority boost. I would also fetch it right away, do some link building, and possibly a little paid promotion to seed some engagement. Update the time stamp.
A good call to action has a clear message and action. It should move people in the direction of purchasing. On a blog post, a good CTA may point people to more in-depth content like an e-book. It can also point people to your products and services. However, the in-depth content is more effective. You can then pitch your product or service using the in-depth content.
James, you give a great template for how a business needs to move forward in their chosen niche online. Quite informative and the meeting of minds has been something a number of us have done online and in person to gain better insight into our small similar businesses. Thank you for sharing your detailed approach to increasing organic traffic...content still is king.
You also should not underestimate the impact that organic search can have on the success of your website. Our research here at BrightEdge has found that about 51 percent of the traffic on the average site comes from the SERPs. In other words, more people land on your site because of the results pages for particular queries than because of your email, social media, and paid marketing efforts combined.
Beyond organic and direct traffic, you must understand the difference between all of your traffic sources and how traffic is classified. Most web analytics platforms, like Google Analytics, utilize an algorithm and flow chart based on the referring website or parameters set within the URL that determine the source of traffic. Here is a breakdown of all sources:
Organic is what people are looking for; the rest of these simply put things in front of people who may or may not be seeking what you offer. We know that approximately X number of people are looking for Y every day. So if we can get on front of those people, we have a much greater opportunity to create long-term relationships and increase our overall ROI.