I like however some other elements included in that mod, and will add them to mine :)

thank you comrade for your appreciation.
However the example you provide suffers from the same problem as mine, self-heating does not work, and neither does pollution, I just checked, it's identical to my situation.

As for the doors, I'm sorry, I avoid placing entrances elsewhere than where doors are located, except for highly impractical situations. I know it's not the most optimal for the walking distances, but I prefer it as it is more real looking.

1. Вот пример того, что Вы хотите.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2992505491&searchtext=%D1%82%D1%80%D0%B0%D0%BA%D1%82%D0%BE%D1%80
И да, имело бы смысл, добавить звезды и тип (бассейны и пляжи).
2. Сдвоенный вход, притом, только с одной стороны - не очень хорошее решение. Его сложно корректно подсоединить к дороге, чтобы это смотрелось адекватно. А отсутствие боковых входов сильно снижает полезность здания в целом.
3. В остальном, все качественно (как и все Ваши работы). Спасибо.

Ιt does not work with sports buildings, I checked. I suppose other types of public utility buildings too.

Try the $CIVIL_BUILDING procedure. It is she who includes self-heating. But I don't know how it will work with a sports building.