To me, it would give an interesting character depth to Rarity and her relationship with Spike.
To me it's strange how what started as an annoying gag to me, Spike's crush, has intrigued me. I would love in fanfictions to explore Rarity as almost a mentor figure to Spike, teaching him how to be a gentleman but also even how to use his talents like his creative talents to make something of himself.
I think Spike and Rarity's relationship is so underutilized. I actually would be fine if Rarity is too harsh on Spike with chores IF she has a well intentioned reason for it that she has to overcome.