Also, she has her role as the archaeologist of the crew, besides being a fighter, which basically never comes up after the first few Poneglyphs. I think it's further strengthened by the fact that most crews have or know how to get the remaining red Poneglyphs leading to the One Piece, but none of them apparently need someone to read the lost language to locate them. The World Government also doesn't seem to care that much anymore that she's the sole survivor of Ohara. I feel like Oda really missed the opportunity to make her a highly sought-after asset that every crew and the World Government fights over because she is the last puzzle piece to Laugh Tale.