Good grief! Is this a joke? I really cannot imagine what is wrong. I have had an X-T5 for over a year. I don't have any focus issues and I have made many exhibition prints up to A2 size. I can say this. No, it will not recognise different objects automatically. You have to set the required object. However, you shouldn't really need that function for general shooting anyway. Assign a button to face detect and set the eye detect to auto. I rarely have an out of focus portrait. Bear in mind that if you are using your zoom at the long end, the depth of field wil, be narrow.
What do you want pixel shift for? Unless you want to make billboard size enlargements you don't need it. Also, it only works with the camera locked down on a tripod and a subject that is absolutely still.
What body wear problems? I have not experienced any.
The X-T5 is not a video centric camera. I have not heard of any overheating problems though.
