Psylocke is also #problematic because she wasn't born Asian, and so sometimes she's sort of implied to be Yellowface, even though no one actually says that because it doesn't really make sense as its not the character's agency, nor is she making light of Japanese culture - on the contrary. Not that many people know she's White anyway. Plus, if you're talking about someone appropriating Asian culture, there's a whole Wolverine right there, and no one wants to talk about that at all. So, yeah, maybe the best hero who's Asian, but not the most Asian hero. Though I personally would prefer a Japanese mutant film with Psylocke, Revanche, Sunfire and the like. Maybe they'll make it into the Shang Chi movie?
I'm also reminded of when Feige was really excited about Iron Fist and exploring that kind of thing. I imagine he hasn't really had that itch scratched yet and that Shang Chi is the next best, or maybe even actual best thing. I also did a quick wiki search of Shang Chi and see that he has Chi control, which means he is a super powered hero, likely to be at least on par with Black Panther and Captain America. My entire perception of the potential of his film changes now, hinged on that. I'm thinking Asian Coulson, but now I'm like... yo... Asian Cap. I could get down for that.