The more notes are managed in Agenda, the more confusing and overwhelming the views become. The only way to ensure clarity is the collapse function. Unfortunately, this view does not always show all the information that is needed. Image previews and multiline text previews as user-setting would be a useful function. Such previews are known from any other note taking app (like Bear Notes and Apple Notes). The user should also be able to automatically collapse all notes when leaving a perspective.
We indeed have plans to add more viewing options just as you describe, stay tuned!