as a mathematical physicist working on topological string theory and mirror symmetry, i dont think it is possible to use QFT to describe any phenomenon in Tyria, just because i dont see how can the definition of a QFT be introduced ingame, a QFT is an n functors on n categories Bord S n whose morphisms are manifolds with extra S structure, when S has a conformal structure we are dealing with CFT, when S has a pseudo reimaniann structure we are dealing with QFT and so on.... also me presonally i am against having all kind of physics and math ingame because well that's baisically my job so coming from a day of work to find out more about QFT in gw2 can be meh for me lol... but i would not be against including some simple classical physics stuff to explain and describe the magic of Tyria.