First of all, I am quite new to the game, so maybe my proposal will not be in the mood of the game, or maybe someone already made a similar proposal.
This is about end game, high level stuff, and so on.
I based all this stuff on my experience on other games like A Tale In the Desert for example (I played it a bunch of months).
I am not an expert in the Scandinavian Deities so I'll keep with nonames, feel free to add names that matches with H&H.
The concept : Deities, Altars and Offerings.
Anybody would be able to build Altars, One for each God (God explained after).
Once an Altar is built, you can offer stuff he asks for (like the Ancestors). This fill a bar. Once you've filled all the bar, you have acces to a pray, which gives you a little buff. It allows you to start Offering better stuff, filling a second bar... Each time you fill a bar, the buff is better. The God asks for better quality each time you reach a step. After 5 steps (so 5 bars filled with offerings), the God is happy, and a Gem of that God is created in the Altar. You can pick it up, and it will be used later, for another purpose.
A Chief of a village can build the Altar of the God of the Gods. In this building, you can put the Gems of the differents other Gods you made with the others altars.
Once you filled this Altar with 1 gem of each God, then you start a global Timer. Once the timer is done, you're Village won the game, and a wipe can be made

The Deities.
God of Nature : Asks Wood and Trees stuff. Each level grants you a 30min +1 Agi Buff. So, if you have an altar level 3, you have +3 Agi for 30min each time you pray on this altar. Creates a Gem of Nature (green gem) once last level reached.
God of the Travellers : Asks Exploration Offerings (All the LP stuff you can acquire with Exploration Skill like foraging stuff). Each level grants you a 30min +1 Percep Buff. Once you've reached the last level, a Gem of Travel (light blue gem) is created.
God of the Hunters : Asks Raw meat Offerings. Each level grants you a 30min +1 Str Buff. A Gem of Blood (red gem) is created at the end.
God of the Seas : Asks Raw fish. Each level grants you a 30min +1Int Buff. A Gem of Water (dark blue gem) is created at the end.
God of the Farmers : Asks Farming stuff (Seeds, vegetables, etc). Each level grants you a +1 Dex buff. A Gem of Wheat (yellow gem) is created.
God of the Blacksmiths : Asks the Mining stuff (ores, bars, smelted stuff). Grants a +1 Con buff per level. Creates a Gem of Iron (Metal Gem) once last level reached.
God of the Gods : Once the 6 Gems gathered and added to his Altar, you have X days to defend it. It you success, you're village won. Every other village will be attacking you to stop the timer

Why this stuff ?
First, it will add some nice value to High Quality items, as they will be necessary to fullfill the lasts levels of an Altar (more levels you have, more Quality is required to fill the bar for the next level).
Second, it will add some goals for every single village : you may try to win the game.
Third : Every single hearthling can benefit from an altar, even if it's a low level one. So everybody will try to raise a little some altars. And some small groups would want to specialize in one or 2 High quality items, to trade with bigger villages which run for victory.
Fourth : The villages will have to attack each other to slow other villages or steal their gems.
Conclusion
Here the things I've thought about. I hope you can understand what I mean, as you can see, English is not my native language ^^.
Feel free to ask questions, to add things.