If it’s someone that’s heading up products, they should probably talk a lot about product development, or product strategy, versus marketing. I think speaking to the core skill set of the executive or individual that you want to be a thought leader, and then similarly building out a content strategy and plan around the frequency and the topics that they plan to cover.
Together is better! For many businesses, the best approach is a mix of both organic and paid search results. The advantage of this approach is that organic rankings give a business credibility and evergreen search results. Paid search (PPC) provides immediate top-of-the-page listings and greater click through rates, i.e., sales, when consumers are ready to purchase.

At the retail level, the two top organic food sales categories, receive significant price premiums over conventionally grown products. ERS also analyzed organic prices for 18 fruits and 19 vegetables using 2005 data on produce purchases, and found that the organic premium as a share of the corresponding conventional price was less than 30 percent for over two-thirds of the items. The premium for only one item—blueberries—exceeded 100 percent. In contrast, in 2006, organic price premiums for a half-gallon container of milk ranged from 60 percent for private-label organic milk above branded conventional milk to 109 percent for branded organic milk above private-label conventional milk. See the ERS report for more on this topic:
Why? It allows you track visits on a specific web page. Whatever page that newly acquired customers land on after the sale, this will be your “Destination.” You can add the URL of that page in the “Goal details” section. There are other optional details that you could include. For example, you can assign a monetary value to a newly acquired customer. You can also map the journey that customers take up until they convert. At the very least, configure the first option. You need that hard dollar value to calculate ROI.
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.
Well, yes and no. Sure, you can get hit with an algorithm change or penalty that destroys all your traffic. However, if you have good people who know what they are doing, this is not likely to happen, and if it does, it is easy (in most cases) to get your visits back. Panda and Penguin are another story, but if you get hit by those it is typically not accidental.