The term eating your own dog food is suspected to have originated from software teams such as Microsoft to describe the importance of using the very products that you are developing, marketing and selling.
As you evaluate your content needs and iterative strategy to parse words that reflect your particular brand I can't help but think that this remains good advice. It is important to have a well-choregraphed process in place so that you are launching an authentic voice no matter how many content channels you develop or for what specific audience.
Larger companies typically have small teams that collaborate on big content media tasks and are aligned with specific roles for the final deliverable. I had to learn the hard way that when these outputs are evaluated and fall short of the quality standard especially in team environments, fingers will point at a responsibility or a review process that either didn't happen within a required timeline or an asset that didn't develop according to plan. Naturally there are sensitivities of criticism levied within an organizational culture of leadership and responsibility. I now start at square one with new collaborations and create team developed checklists to keep the group efforts cohesive and not critical of fellow colleagues.
I also learned early on that a consultant is not necessarily brought in to join hands in the break room and sing kumbaya (I know. What a shame). There is usually either a piece of business tailored to a specific skill needed from outside a companies talent pool or there are pain points that need addressing. The Pareto Principle loosely states that 20% of the effort can generate 80% of the result. This means that you need to know where those pain points are and to evaluate them before you go into content promotion. A well-designed checklist that reflects the issues that need addressing and what action items are required and by whom will help keep you on track. Sometimes we need to munch a little kibble to get closer to the problem that needs solving.