I'd summarize as, "Well, she's not wrong." Frankly, Democrats have never* been terribly good at messaging.
* "Never" meaning "in my adult memory", which is reasonably extensive (and get off my lawn).
That's not what is going to happen, what is going to happen is the DNC will one of their own to pin the blame on then jettison their entire political career and then blame the GOP for pulling the investigation lever. That's the standard political playbook in a situation like this.
The court of public opinion will demand a pound of flesh and one will have to be given.
Obama put distance on AOC which means there will be two targets. The Squad will go after Pelosi and say it was her leadership that created the losses and cost. AOC wants to neutralize Gavin Newsom from running in 2024 and he can only do that if Pelosi manages to hang on a little longer. Pelosi and the dinosaur unit will go after Ilhan Omar because she's The Squad's weak link and the one most likely to fall under financial scrutiny. They can use her as well as the narrative that left over Trumpers went after her as a form of racism.
The problem is the only way to run the entire board in 2024 with court packing and retaking more Congressional seats would be to draw in an outsider. The DNC needs Oprah Winfrey to run for POTUS. She would immediately get the black vote, Hollywood, MSM, women and pull in a lot of undecideds. She would get the platforms of nearly every celebrity besides Jon Voight and the Dukes of Hazzard guy. She would have to openly come out as gay though, which is unclear if she'd do that, to immediately get the LGBT vote. Her fundraising would be off the charts. She's already part of the current wealth class/establishment so she's only a political outsider and not a wealth outsider, whereas AOC is technically both. Winfrey understands how to use the media and they already fear her. If Oprah runs, she wins. She's a pure 8 year lock.
Democratic politicians
Stacey Abrams, 2018 gubernatorial candidate[4] - Won't get enough support
Michael Bennet, U.S. senator from Colorado[5] - Won't get enough support
Andy Beshear, governor of Kentucky[4] - Won't get enough support
Cory Booker, U.S. senator from New Jersey[5] - Won't get enough support
Pete Buttigieg, former mayor of South Bend[5] - Being openly gay and male together will cost him too many votes. No one wants to hear it or say it, but it's there. I can't change society. Use the Report Button on me if you wish, for saying what everyone knows is political reality. He's actually the best functional choice after Oprah and the since cancelled Tulsi Gabbard
Andrew Cuomo, governor of New York[4] - All the COVID19 deaths will sink him/Writing that victory lap book will lose NY to Team Red.
Kamala Harris, U.S. senator from California[5] - I don't see how this works unless Biden is cashed out in two years, in which case it will look like Biden was only POTUS by proxy, which will hurt her.
Jay Inslee, governor of Washington[6] - Rioting in 2020 will sink him
Joe Kennedy, U.S. representative from Massachusetts[5] - Won't get enough support
Amy Klobuchar, U.S. senator from Minnesota[5] - DNC can't leverage her/control her/blackmail her, they won't push forward anyone they can't control
Michelle Lujan Grisham, governor of New Mexico[6] - Won't get enough support
Gavin Newsom, governor of California[4] - Depends on who wins the internal fight for the DNC
Alexandria Ocasio-Cortez, U.S. representative from New York[4] - Depends on who wins the internal fight for the DNC
J.B. Pritzker, governor of Illinois[6] - Won't get enough support/Being in the same breath as Lori Lightfoot will be political death.
Gretchen Whitmer, governor of Michigan[6] - Won't get enough support
Is there anyone on this list that Dan Crenshaw/Nikki Haley can't beat besides Oprah?
On "messenging", that's not realistic. The DNC has to appeal to a very wide base and, in doing so, can't hold any specific platform to run with and galvanize around. The only reason the "Defund The Police" and BLM and socialism and rioting angles came into play was the DNC NEEDED the votes/money/influence from the far left and radical left. The idea that they are playing it "moral" or "too principled" or "lack the ability to get an effective message out" is BS. They need to appeal to Blacks, women, gays, socialists, radicals, Latinos, Asians, and on and on and on. With the information age, as Ice Cube so easily put it, the minority vote is no longer free for the DNC, if you want the vote you need to give something back to those communities and cultures. This type of campaign style will require heavy taxes ( someone has to pay for all these entitlements/programs/etc/etc) and that will hurt the overall platform.
Who gets the DNC 2024 ticket determines the potential for fund raising, which turns into dollars and dollars buys ad time/influence/votes/access/etc/etc.
If you had to pick today, between Newsom and AOC, AOC seems like the one I'd rather have with the nuclear football between the two ( but that's like picking between Marc Levin and Jason Wood on whom I'd want to go on a 19 hour non stop road trip with across America) , but Newsom will have Pelosi's money machine behind him.
If Kamala Harris somehow gets the ticket, the GOP will promise Tulsi Gabbard whatever she wants to run as an independent and gut Harris again and again in the press. As an independent, Gabbard can just run roughshod over the entire DNC. Cancelling her was one of the worst mistakes in modern politics.
The DNC's choices looks like to lose POTUS and more of Congress or just lose the POTUS.
Right now, that means Newsom.
You can't run Hillary Clinton, Joe Biden and Gavin Newsom in three consecutive elections and expect not to lose a crap ton of moderates, undecideds and minorities. Without Orange Man Bad, the DNC literally handed Dan Crenshaw the Presidency. And uncounted number of Congressional seats that will turn red accordingly.