CROSS-PACK GAMEPLAY
I'll add things as I find them, so check back later. This is post version 3.
Cottage Living
Picnic Baskets x Romantic Blanket
> Picnic Baskets snap to Romantic Blankets (can be dragged from inventory to blanket slot, but only works on lots not in the open world).
> Slotted Picnic Baskets show as a food option when Set Up Picnic... is selected (buggy on home lot as sometimes the food isn't recognised, but worked fine for me at community lots where I'd more likely be picnicking anyway).
> Shareable Treats can be packed into Picnic Baskets (this is bugged - they disappear into the aether and can't be retrieved, avoid doing this for now).
> Reclining on the Romantic Blanket (Cuddle/WooHoo) will knock the Picnic Basket (or other slotted items) into the Household Inventory, so don't canoodle between placing the Picnic Basket and setting up the picnic, or you'll be stuck with the 5 buyable options.
Crystal Creations
Basic jewellery set pieces (bracelet, earrings, necklace, ring) buyable from Flowers & Gifts kiosk (all §90 each). Also buyable via Phone > Shopping > Purchase Romantic Items...
Get Together
Club Filters:
> Career: Romance Consultant
> Trait: Lovebug
> Trait: Romantically Reserved
> Skill: Romance
Club Activities:
> Fun and Games: Play Who's Up Party Games
> Fun and Games: Wear Costumes from Costume Trunk
> Outdoor: Look For, Breed, or Release Axolotls
Growing Together
Walk/Jog/Power Walk/Reflective Walk options now available on signs at both the Park and swimmable Pond. I clicked the signs during CFE and there were no interactions, so this is likely tied to Growing Together (the options are the same).
Horse Ranch
Bottles of Nectar Buyable from the Flowers & Gifts kiosk. (Apple §42, Fruit §90, Grape §123 and Strawberry §132). Also buyable via Phone > Shopping > Purchase Romantic Items...
My Wedding Stories
Wedding Bouquets (buyable and craftable) buyable from the Flowers & Gifts kiosk (§85 for basic/crafted bouquets, §130 for delicate bouquets). This is a the only way to purchase the craftable bouquets outside of Retail/debug.
Wedding Bouquets can be gifted via Give Flowers.
Seasons
Seasons single flowers buyable from the Flowers & Gifts kiosk (prices range from §15 to §144, so looks like standard Normal Quality cost). This is a new way to buy these and the only way to buy them individually outside of of Retail/debug.
Lovestruck bouquets CAN NOT be crafted via the Flower Arranging Bench.
Flower Arrangements CAN NOT be be gifted via Give Flowers, or Present Romantic Gift from Lovestruck, but can be gifted via Give Romantic Gift from Seasons, as normal.
New chocolates and bouquets can be Friendly Gifts or Romantic Gifts (Seasons Gifting), will let you know later about Holiday Gifting.
Summer:
> Water Balloon Bucket near swimmable Pond.
> Water Balloon Bucket in the Central Plaza near the Motel.
> Water Balloon Bucket in the food stall area near the Fountain of Love.
> Water Balloon Bucket next to the Brutalist-Style Fountain.
Winter:
> Small Modern Ice Skating Rink in the Central Plaza near the Motel.
> Small Modern Ice Skating Rink in the Lemon Grove west of the Park.