Glare, fading floors and a west wall are the queries with money behind them
The demand language in Central Texas is heat and light, not drafts, and pages written in that language get read to the end.
Efficiency is the industry's word. Homeowners use symptoms. A bonus room over the garage that never cools. A living room nobody sits in between four and seven. Hardwood going pale in a stripe next to the slider.
Give each symptom its own page and answer it in trade terms: glass orientation, solar heat gain, coatings, exterior shading, what a frame material does in sustained heat. Explain what the product will and will not change.
Barton Creek and Lakeway invert the problem. The view is the reason the house was built on that lot, so the question is how to cut heat load without darkening the glass or breaking up the opening. Write that page for those buyers specifically, because a generic efficiency page does not answer it.
Leave savings math off all of it. You can describe how solar control glazing works without predicting anybody's bill, and the restraint reads as competence to a shopper who has already been quoted by someone waving a payback number.