As someone who has completed both MySims and MySims kingdom, I have a huge list in addition to stuff already mentioned:
MYSIMS BUGS:
-New icons for those that are wearing costumes has the outfit offset. My own Sim wears the cute pink maid outfit, but yet, in the save screen, she's wearing the Alice outfit. When simply giving Ginny freckles and blush using the costume chest, her icon's outfit was different as well despite her outfit being unchanged otherwise. This only happens with the Costume Chest specifically.
-Speaking of the Costume Chest, when someone else tries to interact, their interact buttons linger on the lower bottom of the sims creator screen when they shouldn't.
-Also, speaking of Ginny, the red hair color for her hair style has a slight texture issue. The darker highlight has a greenish tinge to it.
-2D graphics for Sims interactions vanish upon spamming those interactions. For example, my sim trying to blow bubbles but they simply won't show up, or my sim throws a bag of... nothing.
-Fishing is VERY buggy. The bobber doesn't always duck down when it should, or it ducks down when it shouldn't, and sometimes isn't responsive.
-When having multiple pages of tasks, I could not access the third pages onwards unless I opened up to look at a task first.
-There seems to be a limit of how many essences can be accessed to paint walls. The max number of essences that can be accessed cuts off too early, where the bacon is with the Tasty essences. This is very annoying as someone who LOVES the tasty essences.
-Sims will huddle around you when interaction spamming. I don't know if this is intended behavior, but it makes farming for blueprints from specific people annoying.
-Some windows and the movie posters have odd logic to things being able to be placed on one side of them, but not the other.
-For the Rook and Pawn trees, sometimes, an essence will just get stuck to the top of them with no way down. I've also had this occur with the oven with the "roof", with a rainbow trout getting stuck on top of it.
MYSIMS KINGDOM BUGS:
-The flower gate thing sometimes doesn't allow sims to run under it consistently.
-Characters getting stuck/falling off seems to be a consistent issue. There may be an overarching collision problem at hand.
-Sims will sometimes wait a bit before they register they have extra tasks to give.
-Sometimes, sentences get cut off, or for collection quests, some dialogue commenting on the quest items simply does not happen.
-Petal's hair outright lacks her silver hair color for some reason in the wardrobe function for the player.
-Cows escape the pen, and all other animals get offset when building in the pen. There should be a happy medium of them roaming and staying within the area they should stay in, and should get magnetized back to the area they are supposed to be in if offset.
SUGGESTIONS FOR MYSIMS:
-Controls suggestions: building houses and furniture should have the sticks switched; R stick for rotating and L stick for moving the furniture. The fishing bobber should also use the left stick and not the right one.
-Garden Lots should be revamped to move in Sims instead of simply being empty houses to work on. I only have ONE townie with all commericial sims being moved in, and that is genuinely sad because there are so many cool townies I want to move in! In turn, it would remove the need to save the garden as well if it just worked like all the other areas with how the housing plots work.
-Maybe bring some Kingdom introduced characters as new Townies!
SUGGESTIONS FOR KINGDOM:
-Remove the outfit gender barrier for Kingdom, please! Even if the gender stays, stuff like wearing Lord Daniel's outfit as a girl
-Bring back two face paints like MySims had! I wanna wear the heart face paint as well as the tattoo again...
-Changing the outfits for NPCs would be so cool, just like how it was for MySims.
SUGGESTIONS FOR BOTH:
-More hair colors and eye color changing! Some hair styles also only have four hair colors anyway, but I'd love to see consistent purple, blue, green, pink, white, and orange hair color options. Eye color changing would be super cool too, as I'd love to have Dolly's eyes but in a more rich blue.
-Consistency between the designs to reflect current consistent design elements. MySims Kingdom Morcubus for MySims, Roxie and Poppy getting their black hair for Kingdom, Ginny getting her bright cherry red hair for MySims + maybe her bangs, etc. Returning tans to Yuki and Rosalyn would be nice as well.
-Bring back more unused content, such as the Essence Master for MySims, and the cut island + Makoto (maybe for the Academy) and Beebee (Maybe for Cutopia) for MySims Kingdom!
For that one EA employee that has been reading all these bug reports, I know this is a big list, but thank you for reporting to the team about all of these bugs (and hopefully the suggestions too)! Here's hoping for some nice, big updates filled with love!