Earlier quoted context omitted.
Being able to pardon for things from your administration during your own term seems to erode checks and balances. Some kind of limitation on that or maybe at least some kind of congressional approval could keep out the truely egregious stuff. Aside from that the self-pardon question should be ruled out entirely or all checks and balances are basically gone.
The presidential pardon has allowed our country to move on from problems that would lead to decades of prosecutions and counter-prosecutions as power changes party. Nixon and the civil war are both examples.
In other words, Black people would beg to differ.