I liked these two parts from The Economist talking about the hypocrisy, as well as putting this into context with other Presidents. This will give Trump even more cover to pardon all the J6 defendants.

"It is an act of hypocrisy. Asked in June about a pardon for Hunter, the president replied: “I said I’d abide by the jury decision, and I will do that. And I will not pardon him.” This was not a slip. Mr Biden has said the same thing several times. The pardon exposes him as the sort of politician who says one thing and does another. Yet if the harm were just to Mr Biden’s reputation it might be contained. Other presidents have pardoned people close to them: Jimmy Carter pardoned his brother, Bill Clinton his half-brother, Donald Trump his daughter’s father-in-law (and just appointed him ambassador to France). Voters have moved on, and Mr Biden will be a private citizen on January 21st.

Unfortunately, hypocrisy may be the least damaging thing about the pardon. Mr Biden’s refusal to interfere in the Department of Justice’s (DoJ) investigation into his son was cited by some Democrats as evidence their party was different. Unlike MAGA Republicans, whose respect for the rule of law and norms like DoJ independence was selective, their party acted on principle. That argument has been exposed as meaningless, and at a particularly bad time for the high-minded principles Mr Biden once claimed as his own."

And then this part

“The charges...came about only after several of my political opponents in Congress instigated them to attack me and oppose my election,” Mr Biden wrote in the preamble to the pardon. Sound familiar? The prosecution may indeed have been selective and flimsy, but it was conducted by an independent special counsel in front of an independent judge, and won a conviction from an independent jury.

The pardon thereby confirms the cynicism many Americans feel about their politicians and institutions. In his speech to the Democratic National Convention, Barack Obama warned Americans that Republicans will “tell you that government is corrupt; that sacrifice and generosity are for suckers; and that since the game is rigged, it’s OK to take what you want and look after your own.” What is this pardon, if not the president looking after his own? Mr Biden applies one set of rules to himself and his family members, and another to the people he serves. At least Mr Trump makes no secret of what he is."