Not sure.
Fondest memories of Plaza Singapura was the vintage one with DBS, McDonalds and Ponderosa near the mall entrance.
The design of the original part of Plaza Singapura reminded me of Centrepoint, Lucky Plaza or the pre-revamped Funan. Rectangular atrium, escalators to the side. Malls built around the same time period probably were designed by the same bunch of people, followed the same aesthetics.
Bonus: lifts with glass windows, bridges to link you to the other side on higher floors (think Thomson Plaza or the now-demolished Plaza Sentosa in JB), spiral staircases that let you go up and down floors without needing to use escalators.
And I like malls that let in natural lightning from the skylights on the roof/ceiling.
https://oceanskies79places.blogspot.com/2011/09/remembering-ng-eng-teng.html