There are so many factors involved with the rod length discussion. It's fun to talk about but you can't draw too many conclusions with basic calculations. For example the wrist pin and crank offset affects the side forces on the piston. BMW has optimized their N20 engine (for the F30 chassis 328i) for positive crank offset and negative wrist pin offset in order to reduce noise.
modern engines have gotten so optimized to meet strict targets of noise, oil consumption, emissions, and longevity that it becomes difficult to optimize something without a lot of expensive equipment, manpower, and software.