While I view the dems as historically very bad at messaging and marketing compared to the GOP, they have a real opportunity here.
The trump team stonewalled and obfuscated at every turn, while the Biden team is providing everything requested. It would seem every hearing on the subject gives them an opportunity to reinforce this message.

I mean - maybe? I personally don't think that "responsiveness" is going to be an especially significant point of focus in these proceedings. I don't think the public noticed or cared all that much that the Trump Administration was recalcitrant in turning over documents**, and I expect they'll have the same indifference towards the Biden Administration's cooperation. Plus, the GOP will just keep trying to subpoena records from the prosecuting teams, which prosecutors will refuse to cooperate (for very good reason), and that will be what they point to when they claim that they can't get to all of the truth.

I suspect that if any/many Democrats are spending much of their camera time praising the Administration's responsiveness, rather than making other more substantive points, they'll be wasting an opportunity. Not seizing one.

Albaby

**The one exception might have been Trump's federal tax returns. But since when they were finally obtained by Congress (and subsequently released publicly) there just wasn't really anything significantly interesting about them, there's not much hay to be made of the grinding fight over access.