Well the advancements in modeling and simulation certainly help no doubt, but remember this design is not a revolutionary concept as far as past PLAN ships go. It is basically a larger 052D with double the VLS cells, same CIWS arrangement, same main gun, COGAG instead of CODOG but using the same GT engines, and similar if not identical AESA MFR. The ESM mast is new. Possibly the ECM may also be new, possibly not. That's about it. Future versions may start using more fancy propulsion systems like IEP but I seriously doubt the first batch will have it. So really there is nothing groundbreaking about this design and so it is not hard to see why the PLAN feels so comfortable producing the 055 in large quantities straight from the get go.