Many moons ago as an apprentice, I had my spell on “house Bashing” Four of us, 1 electrician, 2nd and 3rd year apprentices and a labourer. We could rewire a house in a day, mostly done by 2/3 o’clock, some times we were there till 8pm!
We would chop out, fix boxes, wire, cap then 2nd fix in the day, the plasterer would follow the next day....this was standard on Housing Association properties. Not ideal but it is done that way.
So 2 electricians over two days is about the same pace.
The chasing isn’t the best but it certainly isn’t bad.
The melted socket is likely to be caused by what has been plugged into it (plasters 110v transformer would be my guess)
The loose wire is a bit more worrying and is probably down to rushing. Proper testing should have detected that issue.
The SWA going in front of skirting.....who knows why, perhaps there was something obstructing the route behind the skirting or being in a rush it was quicker to put it in front