I'm torn.
It's bad to pardon family, but at the same time, I'd fully support pardoning a random person who had a no-prison plea deal the judge threw out after the defendant admitted guilt.
Especially when the crime that resulted in a jail time sentence is one that's almost exclusively used as an add-on for violent offenders. Any person with a medical Marijuana card and a gun or who ate half a gummy at a friend's house in a state where it's legal while their gun was locked in a safe at home has committed the same crime.
But it also looks bad for him to pardon his son, and Trump's sycophants will absolutely cling to this.