First off this is the Sims 4 not the Sims 3. Looking at the worlds we have gotten so far and their lack I never understand people asking for this much anymore. They made mermaids with no underworld, farms with nearly no animals and no largest lots possible to make huge farms with, and the vampire/magic worlds have nearly no places to live.
This is the Sims, no reason why there can't be a Las Simgas Palace and a Monte Carsims Palace in one world. Casinos, hotels, pool bars from the Sims 3 brought back would be so nice.
You've asked for too much up there. Just like with the farm pack, they won't give you the main idea/flesh it out and you get a bunch of junk that could've made up another pack. If we are asking for casinos, hotels, and more for pools, then you should stick with that or like farms, it won't be fleshed out and never will.
Personally, since they have most of this in place already such as hotels and anything else basegame they can use so focus on:
more machines for the casino
Make resorts/hotels a thing and the ability to make your own like in the Sims 3
Add pool bar and other pool things that people have been asking for
Add some standing video game machines( we had tons in the Sims 3 to make an arcade, but near none in 4)
Introduce riders/riding car machines so toddlers will have something to do at these places if they come with their parentsDon't use it as an excuse to give us copies of stuff we already have such as bed # 52, end table #33, bar #10(I mean a building/real bar/we have too many already and can visit them anytime, plus basegame bar can be used in the casino so we can get new stuff) ect. Base game stuff should be utilized so that resources for a pack can give us new stuff and not just copies of junk we have too much of already. (
vibrating bed, heart bed, swan bed would be different enough, but not just plain old another bed.
That's something I do hate about the Sims franchise. Some are different, but how many beds that look slightly different do you need???)
Some of your other ideas could be in free updates though for those who have it. Saying it as it is above is just letting them give what we already have and not fleshing out casinos; they are never going to give all that stuff above and not even a third of what you have listed even in an EP. Like high schools, really much of it is in college, the dancing mat/cheerleading/group interaction is there from the clubbing, ect. so the only thing new is actually the fair, sitting positions, limited cheer/football (I'm guessing no game), jobs we can't do like teacher/principal, stuff like lockers, copies of junk we don't need for teen rooms so that resources are too used up to allow teaching/principal jobs, going to class (no real teaching job; they chose to go off topic with the fair instead of fleshing out teaching)The fair would've made a great pack on it's own and been fleshed out better, but now probably we won't get real teaching and the fair won't be added to so neither is fleshed out like they could if packs were on subject like they should be, hello farming and no mermaid world underwater).
Point is when we ask for something we should stay on topic or we'll get packs no fleshed out, not on topic, and ones that will never be revisited again. Like farms. Been waiting since Sims 3 to get a real farm and even though I do love everything they did with the cottage one, it was a huge let down for Sims wanting real farms.
Just say finishing up that I loved Sims 3 casinos. Not enough machines, but I loved that world, the casino, and what it did have. I also so loved having my own resort and trying to fix it so I could be a certain star resort.
I really wish they would focus on hotels and casino machines the most if they make a pack like this. 
