Just to note - they specifically added those other commutations to elicit your exact reaction:
"Some look shady, but it's mostly good".
"Some look shady, but it's mostly good".
And he didn't particularly abuse the power. The record for one day of pardons/commutations is 330, set by Barack Obama on his last day of office. I believe that the record before that was set by Bill Clinton.
For a previous example, Bush Sr commuted the sentence of everyone involved in the Iran-Contra affair which prevented that investigation from potentially reaching him. (Given excerpts of his diary released after he was in office, it seems likely that the investigation would have been able to nail Bush in time.)