How much of it is PP? PP always takes a lot more fabric.
A lot of PP patterns have you precut for the PP, and they plan it so you have less bias, but then you have a lot of waste. I did one that I used about 25% less fabric because I ignored the directions and cut much smaller triangles and didn't pay any attention to the bias as it does not cause me problems. That pattern was mostly PP though, lots and lots of acrs of different triangles.
However I did the Sylvia's Bridal Sampler that was not paper pieced and called for 7 yards of background. It's 6" blocks, and it needed that much and there was little waste. That was a queen size quilt. I ended up running short so did some of the center blocks with a different coordinating background and it turned out fine.
It's a really pretty pattern, I don't think I'd PP anything but the arcs. Also, if you run short of background, you could use a different one for some of the rounds and it would still look fine.