I actually made a post about that in the MK sub-reddit:
One of the things I didn't like about the 3D era games, from MK4-MKA, is that every character was appointed with a weapon to wield. And a lot of those weapons just didn't fit the characters, imo.
There are already a good bunch who have weapons in their moveset - Kitana with her fans, Mileena with her sais, Jade with her staff, Scorpion with his swords, Kenshi with his katana, Takeda with his whips, etc. Those characters should of course keep their weapons as part of their natural moveset.
However, then characters like Johnny Cage, Sonya, Ermac, Reptile, Liu Kang, etc, who don't have weapons naturally as part of their moveset, I personally don't think they should get a weapon shoved into their hands JUST to have a weapon. I'd rather the NRS team would be more creative with their movesets than just going "Here, Sonya, here's a stick!".
From what I understand of the description of the gameplay we've gotten so far, we will be able to customise the characters' movesets in different ways and then save them as Variations, instead of them being pre-made as in MKX. And I find that a lot more appealing than the characters getting a "Weapon Variation/Style" each, like they did in the 3D era games.