I quite like the delve format for combat encounters with a few caveats. I prefer having story either at the front and encounters at the back or in a separate book so I can flip between them easily. In the delve, i want non-plot important loot. In the story, I want plot important loot. This way I can follow along the story before playing, glancing at the combat to get a feel, and not have to search for a referenced key or item or npc rescued in the delve block. In the delve, I want to have the easy answer for my players of gold, magic items or parcel slot, and XP with the combat itself.