It'd help to look at what AOC and Ro Khanna are actually talking about when they oppose the rule, it's a disagreement on strategy, which is why some progressives support the rule and some don't. The article I'll post distills everything much better but in short a few main points:
Pelosi's stance: PayGo will let us design how to budget and pay for the legislation we pass before it gets to the Senate instead of Mcconnell being able to butcher the plans.
Ro Khanna's stance: Regardless of what we send, Mitch Mcconnell will butcher those plans. We're just giving them more ammunition to work with by having the Dems sign off on cuts and pushing false importance on austerity measures that have largely failed in practice.
Slate’s Use of Your Data
It's a discussion worth having. Is there more value to showing the American people the full vision for a bill before the Senate gets a shot at mutilating it and creating a bunch of talking points around the Dems not passing their own bill. But on the other end, the Republicans will still get to dead the bill regardless except NOW they may have an opportunity to spin what cuts the Dems supported in the original bill but apply those cash saving measures to something they'd support.
For example: House Dems pass a bill with a 12 billion dollar budget and they apply cuts to offset it. The Senate Republicans go scorched Earth on the bill. After the bill dies, the Republicans turn around point out 5 billion dollars in cuts that they didn't mind from that bill and say "the Dems were okay with this money being cut to help Americans, well now we're looking to compromise and give them their cuts in exchange for using that money to fund Trump's wall." For heads that go deep on politics, that probably looks dumb and transparent. But for the broader populace and even for a lot of key media outlets; that frame could easily warp the conversation and put the Dems on the defensive.
The other issue is that I don't trust the Dems in the House to agree on how to pay for provisions their damned selves. The leftists are looking at austerity as a flawed concept and I don't get the sense centrists feel so certain about it (some of the center leaning cats here could correct me if I'm wrong). You could easily end up with a situation where the stalling out on these bills happens without the Republicans having to lift a finger and then the Dems look like they can't get anything done even when they do have power.
So in sum: This PayGo rule is not necessary (doubly so because there's already a law in place) and this is a strategic disagreement with points to be made on both ends. It's not cut and dried as you might think without looking at the core disagreement surrounding it.