1. Metal spiralling I think needs to go because it unballances so many other things and makes quality increases in other areas less relevant, or perhaps just allow two increases in quality (controlled by a processed iron bar becoming a different item, such as 'processed iron' then 'refined iron' with the latter not then being able to be placed in the finery forge), this would at least make it more likely that humans would be able to achieve as much as the bots.
2. Limit combat stats to something sensible. Various ways it can be done. Given that the mindset of the devs seems to prohibit capping stats then perhaps some form of diminishing returns that tend towards a maximum possible combat skill - it is not reasonable that one hearthling should have the strength of a completely different species just based on how much it has eaten and how long it has played for. As a possible example:
Base damage of unarmed move = (10-(25/sqrt [strength+10]))*move strength
Damage of melee weapon = weapon base damage* ((10-(25/sqrt [strength+10]))/5) * (sqrt sqrt [quality/10])
Modifiers = (1/sqrt sqrt [character ag/ua/mc etc]) / (1/sqrt sqrt [opponent ag/ua/mc etc])
3. Place more emphasis on quality system and less on grinding. Again as a possible example rather than having to feed your hearthling repeatedly have the hearthling automatically gain levels according to how good it's last meal was in terms of quality and variety, such that you only need to eat when you have developed better food or to prevent hunger. Similarly rather than having curios expire let hearthlings keep the sames curio continously and gain LP based on them such that the rate of xp gain is increased by making better curios to replace them with rather than making millions of the same.
4. Make villages require having production buildings inside them to have a shield.
5. So long as tree stunting is going to be a thing give all trees at least one early stage seed so that the trees grown are more diverse.
6. Perhaps a form of grading for village shields based on the level of activity inside the village - although I know .. bots..
7. Cap wild animals at q200 like they once were so that you don't get the early game damage to the quality developement game that a q400 bone can do in the first couple weeks.
8. A fancy big dreamcatcher that can catch all my dreams.