I find that strange, because she holds up well in my garden, and I thought she had decent substance. I am going to take another look, I have three clumps blooming now. They are all in full sun.
So I went out and looked and felt of the blooms on 'Victorian Princess', at two thirty in full sun temp at 87 deg. they still looked and felt like plants with nice substance. Of course they were not great substance, but as good or better than most dips.
So in my garden anyhow, it is a very good performer, sorry to learn that it does not do so well everywhere.