Agreed on the infotainment lag, it's not that bad, one gets used to it eventually and won't feel it. The lag I'm witnessing is with the Google Maps on Android Auto, it starts off fine but after driving a few KMs the maps are somewhat behind my actual position. And yeah the rear cam lag is also frustrating at times, but I've adjusted to it now, gotta wait couple of seconds for it to boot up as soon as the car starts. 
I'll take the car to some reputable workshop for TPMS calibration, I hoped it might be possible to do that ourselves.