I can agree with that 100%.
That line feels like it's gonna pack a extra punch if someone plays as a race other than human. I mean, as a human, you come from a noble lineage just like Cassandra; from the start there almost this invisible equal ground that exist between them (this can't be debatable about being Mage Trevalyn). As any other race, you don't have that grounding that a human does, but going passed it with Cassandra has its own profoundness due to how the people who live in Thedas view these races themselves.
Think about it. as Adaar you are a mercenary who is Qunari, a race everyone fears and view as animalistic brute at times. As Cadash, you're dwarf who has no place among those below and who is part of a crime family. As for being Lavellan, you come from the Dalish Clan and have probably only experienced the hateful, judgmental side of humanity. Having Cassandra say that to a nonhuman Inquisitor just oozes of acceptance; that she feels no reason to be ashamed of the fact that they are not from her race and takes pride in the idea of being remembered as a woman who protected and loved the Inquisitor the most. And anyone who has complaints about it will probably end up getting the same treatment as that guy from the prologue...or worse if she has her sword. 
But that's Cassandra; as caring as she is short-tempered XD.
Maker yes it will pack a punch. What I love about Cassandra is that she isn't trying to be some little damsel on your arm. She'll be there right as your side as an equal. I don't know whether or not I want to just pull her to my chest and tenderly kiss her forehead, kiss her passionately or assault her castle again. Maybe all the above.