You can bulldoze those lots and change the lots to residential with no issue, so you can live there. You can also add retail lots to any world (and yes, that takes up a lot of course)
There is a hospital, and a police station in one world and a science lab in a third one. You can edit those to your liking with a cheat. You can only go there if you are in the career and only during your work hours. Only exception are pregnant Sims who can also go to the hospital to have a baby.
This information was available beforehand from many sites that have played the game in advance. There's always lots of information available on the internet and if you were reluctant to buy, maybe it would have been a better idea to just read review before buying.
As WootCandy already said, it's better to post your feedback at the official forum. They have 2 forums just for ideas and feedback over there. AHQ is more for technical issues with the game.
I am too sorry that you don't like this expansion cause I'm enjoying it. Try seeing past what's not there and see what is there. How long did you actually play it ? You might be surprised.
If not, try get a refund for it and as said, maybe read reviews before getting the next one. All the things you complain about was information that was out there, all over the fan site, social media and the official forum.