I agree....first, it is a toy, meant for children, not a real house meant for grown up asking too much of a toy

Second, the extra floor gives you exactly what you need to make an entrance hall and not having to go straight into the kitchen. The other problems are not problems really if you have imagination. I don't think kids make their clickies take poops....

I dunno about kids or even other adults, but my klickies happen to value their privacy! And it also bugs me that they take baths with full clothes on (which is why I want the beach clickies so they can at least bathe with bathing attire on). And yes, for the record, my victorian bathroom gets used by its residents, not just for decoration.
Below you'll see my meager bathroom setup being used by a klicky who values her privacy.
Also, you can see how my kitchen is set up (still meager, as they just moved in). I modded the stairs to be on the right side so that we can take full advantage of the left wall for appliances, but still have stairs leading up to the 2nd floor. You can not do this with the stock setup because the entire left wall is usually where the stairs is. So you have to choose between full-wall display of appliances, OR stairs. NOT both. So I customized it to have both. You can see the space under the stairs is used as the kitchen table area.