This is excellent and should be intuitive for marketers (and SEO pros are marketers!) but we often take the short cut and neglect critical details. What would also reinforce the strategy is way of providing solid projections for SEO (these could be based on industry trends and statistics). Clients now ask for ways to calculate ROI and they need numbers to get budget approvals. Increase in traffic by X,  increase in qualified traffic and leads, conversions etc, some way of quatifying the expected return.
Lastly, it's important to remember that paralysis by over-thinking is a real issue some struggle with. There's no pill for it (yet). Predicting perfection is a fool's errand. Get as close as you can within a reasonable timeframe, and prepare for future iteration. If you're traveling through your plan and determine a soft spot at any time, simply pivot. It's many hours of upfront work to get your strategy built, but it's not too hard to tweak as you go.
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