Old shopping malls definitely are located in more accessible areas of the cities. (Akmerkez for instance). Yet, trends change quickly and people ask for new functions, new spaces within malls. Newer parking spaces are bigger for instance. Some malls have family parking spaces specially reserved for families (Like IKEA). In addition to WC for handicapped people there are now Family rooms and Baby rooms.
If older shopping malls fail to offer such special spaces they can not compete with new ones no matter they are very very accessible-very very central. The adaptation process can be long and yet certainly promising.
Aqua Florya made me feel I am still in the beginning of 2000s. Although it was not very crowded, there was this feeling of being stuck. There was no WC on the ground floor (not acceptable on any terms!) and in the up stairs we had to use WC for handicapped persons as I was with my daughter (it is spacious so I tend to use it when there is no family room). With a unique view of Marmara Sea and exciting view of landing airplanes, Aqua Park disappointed me.
I find Akmerkez successful in terms of this adaptation process. With brand new stores, and renewed food court, it is much more better. One can not increase the height of the ceilings in an already built up shopping mall (not easily) but you may change the perception.