Yup. The idea is to redirect the commoner's revolution into ousting the anti-royal/anti-noble nobility with herself as a sacrifice. Then the Royal Family can clean up the mess with cooperation with the commoners.
The plan makes sense in the way that it has a requirement and an end goal, but I...
Just her own death, I feel. Her real target is just the anti-nobility faction which are the extreme of the extremes. Most commoners dont have that line of thinking even if they "side" with the anti-noble faction. Having Diana, which is the commoner's hero (not the anti-noble faction...