My intention was that all potion effects should last 1 hour, as it makes it significantly easier to adjudicate. I've actually added the following note to the potions section under treasures, as I also thought it wasn't immediately obvious - "Potion effects, if temporary, last 1 hour (poison is potent on a blade for two hits, or up to 1 hour before drying up – save with advantage vs the 2nd hit)".
I'm getting closer to v1.0. I've revamped the Wilderness section, which now includes a half-page set of terrain-based feature tables, with splits for water, plant and land features. I've tried to keep them as concise as possible, but results like "Dust bowl", "Creek" or "Wildflowers" should be enough to send you in the right direction! Terrain feature is also now tied into the expanded wilderness discovery table too.
I've added some tables for resources - types of stone, wood and metals (e.g. for trade or construction/item crafting), as well as a section on plants (both poisonous and edible) which can also be used as a "what was found on a foraging attempt" roll. On the whole, I'm much happier with the wilderness section - it feels packed, without being bloated.
I've also added a page that goes into detail about incorporating followers into your game, as well as breaking down mechanical differences between hirelings, mercenaries and companions.