You'd like to see single digits iron on 5000mi change intervals at your mileage but 14 is not alarming given you're going 6500mi. The ramp up is so slight I wouldn't lose any sleep over it. On my latest 15,000km change interval my iron was 14ppm at 60,000km.
The shearing is interesting. I wouldn't say the EA888 engines in general shear oil. I have the 1.8L in my 2017 golf and run Pentosin SP-III on 15,000km change intervals and my viscosity (D445) @100C has been (in order, 15, 30, 45, 60,00km) 11.38, 11.77, 12.05, 11.50. The first change interval has the lowest viscosity but was also the factory fill so I can't be sure what exactly it is. My Pentosin SP-III start at a viscosity of 12.16, so in all of my samples here has been only zero/negligible shear given that there is always at least trace amounts of fuel in used oil.