Thinking you can figure out someone in 5 minutes makes you a no hire from me ;)
If someone is reluctant to do changes in his own code it is a no go for me.
Main point of take home I give is so that candidate has his own code to modify while we are on the second round, not to waste time and stress people with something they didn’t wrote/know.
Which is why all of the biggest tech companies does on site technical tests.