1. If I could design a shopping mall I would put a food court in it and a cinema because after doing doing a lot of shopping people usually get hungry. A cinema is a good idea too because than the shopping mall would become a fun place to come with friends because you could go see a movie, eat and shop all in one place.
2.I don't think online shopping will completely replace it because a lot of people like the experience of going to the store. Some people also like to look at the things they buy or try them on before they buy it.