I'm no E.E. and have limited electronics-diagnosing abilities. So, I mostly shotgun replace stuff that I think is questionable. Mostly.
So basically you are creating a heck of a lot more work for yourself than is really required to get the thing working correctly again by doing this.
I am in the camp of replace every electrolytic capacitor in the receiver once it gets past a certain age. If one is out of spec or failed, the others aren't too far behind. I try to use the same specs as original for capacitance, sometimes staying the same voltage rating, sometimes upping the voltage rating if I am trying to replace a specific physical size to fit a bracket or something to that effect. Other than that, I don't usually do blanket/shotgun repairs. Resistors, I only replace carbon composition ones that have drifted far out of spec. I replace them with carbon film as they are more stable than carbon comp. Tantaliums, film, and ceramic caps I leave be. Unless they are burnt up, they are fine. As far as semiconductors go, I only replace them if they have failed. If they haven't failed before the recap, chances are they aren't going to fail after for quite some time after the recap was done. If they are working as intended, I leave them be.
I've owned two pieces of vintage electronics that I have had to do ZERO work to, and that includes capacitor replacement, and they work like the day they were made. One is an all original Sansui 4000 made in 1970, which I believe the original owner used regularly since the day he got it new, and the other was a Zenith tube tabletop radio from 1941 with everything original to it including the caps and tubes. It worked fine as well. So if you go on the theory of replace everything because it MAY fail, you are giving yourself a lot of work for nothing. That 1941 Zenith had to have been used on a regular basis since new, as there would be no other explanation as to how 77 year old capacitors could still test and work fine oh so many years past when they should have failed.
You can do what you like as its your gear, and clearly you have the time, but by shotgunning everything like that not only do you make extra work for yourself, but you also have the potential for mistakes to creep in which could cause other problems/damage to the unit in question.