Yeah, to me that's the real issue with Jango. He's a cool enough looking character, but honestly his mere presence sucked away a lot of the mystery and cool factor from Boba. I mean, Phasma is basically a production drawing that got repurposed as a character because it looked cool. But, she still is (in and of herself) a pretty cool character especially when you factor in the book and comic book series about her. It's kind of sad we didn't get the original ending to the Finn/Phasma fight that was in the TLJ deleted scenes. Because I think that actually got to the core of her character (a ruthless survivor) a bit better than the finished result.
Yeah that might have been a more interesting ending for the character, but I think it probably also made her look even weaker with how it suggested she was hiding this big secret about her role in SKB's destruction, which then causes her own troops to turn on her. So ultimately I'm glad they changed it so she could go out being more of that fearsome and badass warrior we originally hoped she would be. Even if only for a brief moment.