This is interesting because ideologically, I am in the same camp as Yuri. However, her message falls incredibly flat because of her hypocrisy- she seems to be advocating equality while still partaking in every advantage of high society, be it using tax to buy things or demanding unreasonable things as the prince's fiance.
This is why while I am all for abolishing nobility, I have to agree with Iris in that Yuri should learn the old ways in order to properly instigate change from within, not just removing things that are inconvenient for her while keeping things that benefit her.