If any defendants have their cases removed to federal court, that does not change the nature of the charges. They're still state charges, and follow the pardon rules of the State of Georgia. These charges cannot be pardoned by any POTUS.
Based on the statements by Judge Chutkan, and the setting of an October 23rd trial date for Chesebro (and likely Powell), this is moving forward very quickly, and with appropriate "push back."
The reason for pushing for fast trials is to help the RICO case. Having convictions for Trumps minions sets the stage to prove that a criminal organization exists.
Until we see Trump on trail I am not going hold my breath. And federal crimes can be pardon why Trump and co are fighting so hard to make a federal case.
No. There is some legal theorizing that it does, and there have been people who refused pardons because they didn't want the appearance of accepting guilt. But legally speaking, accepting the pardon wouldn't change anything about the situation.