The butterfly signature has nothing to do with Kwannon. It was Betsy's pre swap and should've been hers till now.
Kwannon never had the butterfly sig until now.
I think Fallen Angels was a miss opportunity. It's trying.. but Marvel trying too hard to keep the Psylocke brand stick to Kwannon hindered it IMO.
I appreciate some of Kwannon's added back story, but still fail to make Kwannon has her own identity. It just seems that Kwannon trying to fill in Betsy's previous role as Psylocke. Even her role in Hellion suited better for Betsy. There's no way Scott trust her with his brother. Kwannon should be one of those wildcards.. the mysterious ones.
Kwannon's "relationship" with Laura seemed forced. It'd fit much better with Betsy. I get that Kwannon felt to connect more with the "outliers", but Laura and Kid Cable just doens't feel like outliers enough. I think she'll fit more with the more "grey area" mutants, eg Sinister. Her interaction with Sinister was the best thing came out of FA IMO.
All in all, the current Psylocke feels just like a continuation of the last Psylocke -Besy, with just a different name-Kwannon.
The stories might still enjoyable, but I just feel Marvel miss an oppurtunity to introduce us with Kwannon being a distinct Asian character added to the mutant-dom.