For startups, the most important things are good products and good markets. Successful angels and VCs know that, and will invest based on product and growth, NOT financial metrics. Thus, in very few VC pitches will you ever see stats on ROI or payback rate, that's more something you'd seen in the accounting or I-banking world. (I know this from personal experience, having spent the last year at a silicon valley based VC and seeing dozens of pitches)
So if entrepreneurs are primarily focused in the world of products, features, etc., then the key thing is to figure out the metrics that measure how these products tie to external market value. So things like conversion rates in funnels or cost per acquisition become super important, because the features are the steering wheel to your revenue engine. As a result, the spreadsheet model is mostly focused on things that are granular enough to relate to product and functionality, rather than things like valuation multiples or ROI or other overly-broad financial metrics.