Breakers have a magnetic coil for tripping on shorts and a heating coil that will trip a bimetalic switch on overloads.
So it is norm for them to run "warm". But I have no idea of how warm this was running. And if you do have a resistance breakdown in the underground cable and continous (more or less) currents in that when wet then the breaker will have a tendency to run warmer than normal.
A bad breaker, by it'self could cause excess power being used.
And I don't know the details of your meter socket and panel.
Often a combo unit is used and on the bus there might be places for several smaller breakers to feed things like water pumps or AC units. But you don't have this.
The breaker will connect between the 2 leads from the meter to the 2 buses in the panel. One bus for each 120 volt leg and 240 between the 2 buses.
I don't see any way that he could put it on a different bus.
Is the a REAL ELECTRICIAN (afar as you know)or a handyman that does electrical work? Did he have a truck with the name of an electrical contractor on it?
If he was a real electrican see if you can get him back, maybe ask the park to do this the next time he is back doing other work. Don't have any idea of how often that would be.
And ask him to inspect the panel and meter socket for any signs of arcing or burning from the lightning strike.
And to measure the resistance of the underground cable and megger it if he has one.
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