I'd bet that, deep down, Biden team would view Trump pardoning family & associates as a gift. The last thing Biden or incoming AG want is to be bogged down with Trump admin scandals and pardons would absolve them of hard choices while letting them still pound table on corruption.

The one place where this might operate in the inverse is if Trump pardons himself, because that would create pressure to challenge the constitutional validity.

If Trump engages in corrupt, self-dealing pardons, then essentially it shifts the issue from the executive branch to Congress, which would then have to decide whether and how to limit the power. So there are still ways to address it, it just becomes someone else's problem.

I'd also wager that a similar dynamic would be at play if Trump fired Wray. Trump's corrupt motives and normative breaches ultimately would create political benefits to Biden (who'd get to pick his own candidate without worrying about the statutory norm).

To be clear, I'm not saying Biden wants either of these things to happen or is even spending time thinking about it. He's got zero control over what Trump does. I'm just noting the odd political outcomes of some things Dems are most worried about at the moment (for good reason).