As I appreciate the immersion that J-Lo have been working towards I had some ideas for several concepts that I feel would be small but give significance to the existing gameplay loop.
Seasonal Buffs - Similar to the realm buffs but small passives that makes seasons more impactful
Spring: Consume less stamina when running and passive bonus to exploration
Summer: Gain passive bonus to survival and increased speed of drying racks
Autumn: Gain passive bonus to perception and pigs(or any grazing animals maybe?) require less feed
Winter: Gain passive bonus to Lore and domesticated animals give more meat/fat yield
Rain - This could be impactful in conjunction with rain and other weather types.
Spring: Increased chance for floral curios and foragables to spawn and natural (non character planted) Fruit-bearing bushes to replenish faster.
Summer: Increased chance for insects and small critters to spawn
Autumn: Increased chance for Mushrooms and sea/river-based foragables/curios
Winter: More snow and Ice based curios(sea ice specifically perhaps adding sea ice to make curios that degrade), Increased chance for fishing and finding yesteryear's items
I also wanted to mention the current prefixes for items as I think theres a idea there.
Example: Yesteryear... sizzling, smoked, ect
These could be prefixes that can be "attached" to specific items in categories that give specific bonuses either to food items or to foragables/animals/curios.
Animals could gain prefixes such as "starved", "wellfed", or "fattened" (if slaughtered in the winter)