I can guarantee he wont be feeling the pressure of the additional scrutiny, he will however have the pressure of refereeing the biggest match of the year anyway. He wont feel under pressure to do anything different from his normal refereeing style.
This is some people, with little else to do, looking for a reason to have an early pop at the ref, looking for excuses dependent on how the ref sees certain incidents. We all see incidents differently dependent on who we are supporting on any particular day.
I can guarantee a plethora of complaints from both sides on Sunday evening, regardless of the result