Still that's a lot of substitutions especially if you consider bayerns injury crisis. They missed lahm alaba ribbery and robben for big parts of the seasons even thiago. So you have him being substituted a lot even though they had an injury crisis and was played out of his natural position. Plus the fact they did not defend him publicly. Guess it comes down to more facts than just not playing enough. I also guess media pushed for götze vs pep.