Here's my take, being a supporter and defender of the US Constitution.
The US Constitution grants
plenary power in
Article Two, Section 2, to the President by stating that
"... he shall have power to grant reprieves and pardons for offenses against the United States, except in cases of impeachment."
When
Obama granted pardons to people I thought unworthy I stated as much and then stated the above. I'm doing the exact same here. Don't allow it to deflect from what Trump is doing, but check out the link, it's an interesting list.
The only control we as a people have over this plenary power, is to ensure the person wielding it doesn't remain in office after the next general election. That didn't occur with Obama, because his supporters ignored such actions that they now vehemently and with great force of will take umbrage with Trump. That, the hypocrisy, is not surprising. What is good for the Democrat is often not good for the Republican in some eyes - you can also reverse the parties in that statement and it would be equally true.
Complain all we want, the man is exercising a power that no one can limit or overturn. What is being shown in these threads, however, is the true hypocrisy of those that remained silent or even defended Obama when he did the same or similar. For those that decried both? I tip my hat.