Think of how often a TOS shirt got torn to shreds. They even joked about that cliche in Galaxy Quest. Trek uniforms were always flimsy and very rarely did they use those excursion jackets. The Khan style uniforms looked like they could take the most beating, and the wardrobe dept did get a lot of mileage out of them. Supposedly some of the uniforms originally created for Khan were still in use through Trek VI, although they were fraying by then.
TOS uniforms could have been made out of Kevlar-reinforced denim and Kirk's shirt still would have gotten torn regularly. It was a common trope in 1960s TV action series for the leading man to get stripped of his shirt by his heroics.
I concede that the TWOK uniforms looked heavier and possibly more durable, but they also looked terribly overwrought. If those jackets had been dress jackets for a standard duty uniform underneath, I think the look would have been more compatible with previous efforts to represent quasi-military uniforms in the Trek universe. Imagine if, after Kirk's inspection of the Enterprise, the crew ditched the jackets to reveal something more familiar and less formal underneath.