I respectfully disagree, there's a healthy amount of directions we could take Dixie's moveset. I see a lot of uses in her hair and tons of ways to grab with it. If she only has a cargo grab, she potentially misses out on a few types of hair attacks, as there's only a few ways she can swing her hair before it gets boring. It would be great to give her hair attacks that not only whip foes, but also displace and throw them.
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Down Air for example scoops up people beneath her so she can force them into the air and fight on her turf.
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Up Tilt stirs up airborne victims and swats them away after displacing them. Perfect for those above and behind her.
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Neutral Special is a Command Grab, yes, and it gives her the option to catch and throw foes from 3 different directions (Up, Diagonal, Forward) to their opposite directions.
Dixie can have all this, regular throws, a Cargo Grab and have a moveset that keeps her options varied. She can have a grapple-oriented focus and still be an aerial fighter, much like how Villager and the PK kids are Projectile-heavy while also being a Projectile User's worst nightmare. I don't expect my ideas specifically to be in SSB unless I'm on the development team, but there's room for different takes on a potential Dixie moveset.