I can see what you're saying, but the character adds to the weapon. As Trunks told King Cold in DBZ "You should know that a weapon doesn't make the man". Yes some weapons can be wielded by multiple characters, but its not the weapon itself that makes the character unique. The weapon definitely adds to them, but in the end its character themselves that choose how to handle the weapon. If they are a very cocky fighter they will make bigger and longer ranged attacks. If they are more of a calculating fighter they will wait to see an opening and then make a big attack. Until then they most likely will stick to smaller attacks to not exert themselves. Much of the character's personality is factored in play style and weapon choice. As for female reps, I think It could be a nice change. We don't have as many female reps compared to male reps. 16 females including Inkling,Robin, Wii Fit Trainer and Corrin, that can also be male, compared to 43 males. I really do believe having Edelgard for example would nice as she would be another female character. Her moves would be unique due to wielding an axe. And given her royalty nature, its most likely she would not be a very aggressive fighter. Instead a more quick and powerful fighter. As for how further Edelgard would be unique we don't know as the game she's in has not been released. Krytsal would be unique, but unfortunately she's an assist. And yes I think Im following on what you are saying. Iv played as him before he is pretty interesting too bad they didn't add him in SS5. Or Guy also that one is still surprising to me that he is not in SS5. Yeah theres one of the songs from Samurai Warriors thats more epic but I cant remember what its called.
Have you tried listening to Akuma's theme and Gouken's theme at the same time? You have to time it just right, play Akuma's theme after two seconds play Gouken's theme. If you time it just right they will compliment each other, by almost sounding like one song.