I do think there are a few ways to approach the situation.
There is that option, which plays into the Starkiller’s weakness angle.
One alternative would be to just remove the shield plot altogether. With this option you cut out the stuff about the “shields have a fractional refresh rate” but keep “if we get any higher they’ll see us” to make avoiding their radar their clear motivation for coming in so close.
You could also try to find ways to make the current angle work more. I can’t find a good picture of it, but I was thinking you could use an insert shot from Solo of that monitor in the Falcon cockpit that they use to make sure the ship is at the right angle to make the hyperspace jump out of the maw.
And then you could make an animation that shows a diagram like Scenario B.
You might could remove the “If we get any higher they’ll see us!” in that scenario to make the motivation clear that maybe cutting it that close to the planet surface wasn’t exactly the plan.