Turning a Katana into an ability won’t fix that, the only solution is to introduce new cards, and have the older ones be discontinued or harder to find.
I’m pretty sure they’ve made it clear that’s going to happen at some point.
Plus, it’s not even technically going to work since the devs said they can not remove cards. So what do you do with cards that have the Katana already? Double Katana? What sense does that make?
Just give him something that fits a support or utility role, so he can actually has a use besides killing people. Ultimately that’s his biggest flaw, is that he can kill people yes, but I’d be better off running Fragger or Nader if that’s my goal. Vasilli would be way better since I can comfortably sit back while I pop heads.