Fewer than four months into construction, the $500 million makeover of Westfield UTC shopping center is changing the landscape of the nearly 40-year-old mall daily. From above the recently added 24 Hour Fitness Super Sport on the mall’s west end — part of the mall’s separate $188 million renovation completed in 2012 — construction crews can be seen bustling on what will be the mall’s new Nordstrom and subterranean parking structure. The expansion that three years ago brought that 24 Hour Fitness, an ArcLight Cinemas, and a general renovation to the entire shopping center comprised Phase 1 of Westfield’s foreseeable vision for the upscale shopping center at Genesse Avenue and La Jolla Village Drive.