I think that Susan Fowler is the single most influential individual in Uber's history, even more so than Travis Kalanick.
1. #deleteuber was a flash in the pan. It fizzled because it was based on a falsehood, that Uber had broken an airport strike by cancelling surge. Uber cancels surge for all notable events. Lyft somehow avoided judgement, despite also failing to honor the strike. The impetus behind the campaign was a combination of that strike action and Kalanick's presence on President Trump's ill-fated executive council.
2. Greyball is a multi-million dollar suit, it will likely be settled for less. Because Uber was only foolish enough to abuse it in a couple of cities (according to news stories and law suits, who knows what legal discovery will unearth!), the scope is limited. Furthermore, the cities that ban Uber also ban Lyft.
3. Lyft's meteoric growth in 2017 can be primarily linked to the sexual harassment stories about Uber. They even based their entire advertising campaign on it, "how you get there matters," emphasizing the moral superiority of using Lyft over Uber. The ad campaign is incredibly poignant and effective. Lyft has deftly turned the fiasco to its advantage.
Susan was able to accomplish what no person had successfully done by publishing an account on her blog of what happened. Because she had not sued the company for damages, she was not held to silence from a legal settlement. Any opponent claiming she was an opportunist had no evidence, because she didn't file suit nor was seeking damages.
Because of her, an entire chain of events was set off. The intense public pressure, that slammed customer growth, hampered recruitment, and impacted Uber investors' social lives (yes, that was a major factor!) was primarily from Fowler's revelation of the company's indifference to sexual harassment.