I agree with everyone about the updates for the packs. All of them need it. They not only need what everyone has mentioned but they need to include everything that has come after.
ROM needs spells added to include newer packs like scruberoo the animals from Cottage Living, upgrade objects, turn a vampire into a normal human (even if it is temporary) & scare the living daylights out of the vampire when you do it, the same for any of the occults & a spell to do the opposite to normal sims. These are just a few spells that should be added. I miss the Magic Packs from Sims 1 & Sims 2 for some of the magical abilities & spells. It seemed more mysterious & harder to achieve your inner with or wizard goals; therefore, more rewarding when you did complete them. And turning that pesky neighbor into a frog was priceless.
Cottage Living needs canning expanded to include ALL garden items from all the packs & the canned goods should all have a drop down menu to make 2, 4, 8 & even 20 jars. Even a machine to auto-process canned goods where a sim could put in the ingredients, press a button then come back later & collect the results. Rabbits & birds should be pets as well as garden helpers. I love the shopping stalls but I would like to see the hours expanded & the stores along the walk way be more than decoration. I was a little disappointed my sims couldn't go in & actually shop for clothing or books. I miss the book store from sims 3 (I know it was a rabbit hole) where you could purchase books.
Journey To Batuu really needs buildable lots along with a great deal of other things. Some of what it needs has already been mentioned so I won't reiterate. There should be a money exchange so that your sim could trade Simoleons for Galactic Credits or vise-versa. I know when I was in the Navy & we came into port the first place we hit was the money exchange so we had that nations currency to spend, so why can't the sims?
There should be an update just to address all the packs downfalls. Magnolia World should have at least three neighborhoods but if you upgrade it you would also need to upgrade some of the other packs neighborhoods & probably move players builds into their personal gallery. It would make players mad to have to reinstall their builds but if the builds weren't deleted like when the Sims 2 received a similar update it would be survivable. I really miss that about Sims 1 & 2 that you had several lots to choose from to build on & not just a few. I also miss that when winter came in the Sims 2 & you went to world view it would be echoed. Snow would cover the once green areas but Sims 4 when you leave your snow ridden lot you are greeted with a green view.
I would also like the option to pause holidays in Seasons. I love the holidays but there are times I want to take a break and I don't want to delete the holiday from the save game. I just want to shut it off for awhile.
Grafting of more plants across the packs to yield some of the newer gardenable items so that kava fruit spliced to coconut trees could yield another fruit or vegetable perhaps from base game. This just one example and I've made it known in other posts that I would like to be able to store the sixam plants in the fridge & use them in canning & other recipes. The same goes for herbs from Outdoor Life. I think if its a berry or a herb it should be stored in the fridge. I also think drying fruits, vegetables & herbs should be a thing & that the garlic braids sims make should also be usable for cooking at a later point when sims need garlic for a recipe.
Berries from Outdoor living sims should be able to make drinks, jams, pastries, maybe even poisons from. Fireleaf could be added to a recipe to be given to another sim as a prank so that they would itch or even catch on fire.
Tombstones! All tombstones should have the option for a sim to mourn & there should be graveyards. Even if your sim doesn't know the person buried in the grave they should be able to think of a friend or loved one they lost and mourn for them at the grave. Also the ability to lay flowers on a grave & a prayer animation. Sims should be able to pray in the religion of their choice for not only dearly departed but also when life hits them hard. It doesn't have to be mandatory for sims who don't believe but it should be available for those that do. My game usually has myriad of things from religions, to deviant mods (WW, Base...Men..., ect) in it so my sims can sin to their hearts content or attend religious services or repent of their sins & swear they won't hit that bottle again. My sims aren't all atheists & are free to worship the god or gods of their choice (perhaps with a little direction).
I also think there should be counseling services for sims to help them deal with life's challenges & over come their fears. Right now I'm doing a pretend counseling sessions with a preacher mod. RL needs these things so why are our sims deprived of having ways to reach out for some mental help? It's nice they can talk to other sims but there are times when some professional help would serve them better. Sims 1 had its doctor that would show up when they became hysterical & or dazed from the stresses of sim life. I think it was also in Sims 2 but I don't remember. Right now our poor little sims have to contend with fears that family & friends don't always help relieve. They may be able to blog on the computer about it but they can't write in their journal, or talk it over in the mirror or paint a painting about their fear. Even boxing to relieve fears would help.
I know that I missing a great many other things that need addressed and I'll think of them later but... I hope that all the packs get an update.