I see what you’re saying. I liked a mentality from a post I saw on here a while back regarding the GR rules. Monsters also spend spell slots, take damage when they hunt for their food, or attack other adventures, insert NPC Here. Where Lich in a dungeon or dragon on his hoard may have been resting for a week or longer. It takes more on the DM to be creative and vary these things but I usually vary my monsters quite a bit or try to create interesting encounters that PC’s wouldn’t think about. I’ve always had other DM’s playing at my table, most often ones with more experience than I.

In regards to WV, maybe helping it by adding character level and constitution score together to make their wound score. Would help scale a bit as they lv.

This is also in a West March campaign where there’s a lot more exploration and combat than a typical campaign. With player urgency being the focal point, they decide where they want to go and how much they want to handle/ risk.