The character did start out as somebody’s sister, albeit in a form different from what she’s usually depicted as until recently and when she did adopt the Asian body, that’s due to body-swapping but one where somebody eventually had to undo this. Psylocke might and should be the poster-child for ‘racebending sucks’, but because this was something that’s forced onto the character in canon, rather than a reimagining.
It’s one thing to reimagine let’s say Valentina Vostok into a Yakut, it’s another to have the bodyswapping actually occur in-story where whatever criticism people have of racebending should be applied to what’s been done to Psylocke. There are characters trained as ninjas, but needn’t to be race and bodyswapped for it, but that involves actually care for characters.
Or at least being able to handle it with any real understanding, even if that may not be the right word for it. Elektra may be Greek and trained to be a ninja, she needn’t to be racebent to become one herself whereas this happened to Psylocke against her will. Now that’s different from the usual racebending, which simply reimagines characters.
She may be finally back to being white again, but I still think if there’s any character that does represent the problem with racebending it should be Psylocke first and foremost.