Oh, another idea for you.
Once we sold a house FSBO, and it was actually nicer, I thought, to deal directly with the buyers rather than have everything go through the agents. One of the benefits that we found was that we could say to the buyers, "Hey, we're worried about this" or "We really want *this* but are flexible on *that*" and simply ask the buyers how they would address our concerns and priorities. In some cases, they came up with ideas that were even better than what we thought of.
It sounds like you have agents in this situation, but you could still do the same sort of idea - reach out to the buyers and express your concerns and what's important to you and what you're flexible on, and see what they come up with. Maybe you can contact them directly, maybe it has to go through the agents, but either way, it could work.