I'm really curious to see how the relationship with the two girls will develop.
I think at some point you will have to decide between Luna and Gracie.
And both have probably reached the point where they will be very sad after the decision, which reminds me again of the "threat" of Wilfred....
After the update it looks like the "right" path will be the one with Gracie. According to Wilfred's character descriptions of Gracie and MC, both are future Serpent material, and especially together unbeatable. They complement each other perfectly!
Probably they will be the leaders of the DeLuca family in the end. Personally though, I'd rather be with Luna and let Gracie take the lead.
I also think that she is the real "princess" in terms of looks. Something about Gracie's face looks weird (probably the "huge forehead"xD), while Luna's face is just perfect.
Man, I love this game, the waiting is driving me crazy!