IMO it's pointless to add stars or just increase the HP/DPS of mobs. You can already get that affect by just not upgrading your equipment as much. There are also already many other ways of increasing difficulty with self-imposed restrictions.

How many of you spend time making your base "raid proof" or portal home at night to maximize rested buff. Raise your hand if you have a carpet next to your bed, or even have a door where you sleep? How many have spent the night sleeping completely exposed under a ribcage in mistlands?

IMO, the devs should encourage more non-traditional playstyles, not just make mobs more difficult to kill. One way they could do that is to remove the boss locks so we could gain access to everything without going through the linear progression of the bosses.

Another would be to make reasonable limits on the portal. Prevent or limit pocket portal for instance. Maybe have the ability to add an adjustable cooldown on portals, so you can only use a portal every X amount of time, and/or require much more infrastructure to be in place so they can only be built in bases.

IMO, portal use (or non-use) is a complete game changer. I think most don't even consider it because it can be a huge time sink moving things around, but I think there could be a compromise to disallow pocket portals, but still allow their use for getting across the map quicker. If they did that, I think they could also then remove the restriction on moving metals.

The one change I would make with mobs is to make them more aggressive, and (as others have mentioned), remove the dancing around. They could also make biomes like the plains more dynamic. Everything there just stands around waiting for you to pick them off with a bow. Why doesn't the whole village go on alert when someone drops dead next to the campfire? I find that especially ridiculous.

Another idea that I had recently was to remove the "GPS" functionality of the map. I think a reasonable compromise between the current Valheim Maps mode and no-map would be to remove the mini-map and delay updates of the main map until you sleep. It could even look more like a hand-drawn (not perfect) map. The idea being that you update the map when you get to camp.

In that mode, when you're in new places, your going to pretty much know where you are, since you will see the map changing there, but otherwise, if you get blown off course in a storm, you will only be able to know where you are by looking at features around you and finding similar on the map.