I believe that 20+ (points) and 10+ (assists) seasons are good enough to keep Caitlin in the conversation for best player in the league. And if Indiana finishes Top 3, she'll likely walk away with at least one MVP at some point because 20/10 assists has never been done before. But she can never be seen as the league's top player if she's seen as a major liability on defense. She has to either improve in that regard or she has to become the second-best player on her team if the team is going to contend for a championship. She has the physical tools to be a better defender than she is currently. The question's going to be whether she sees it as being worthy enough of a cause to take up. A few more ringless seasons may help her make that decision.
And with players like Paige, JuJu, Hannah, MiLaysia, Kiki, etc. set to enter the league in the coming years, Caitlin's place as the "next generation's superstar" will have legit challengers. She's going to have to defend if she wants a shot at a title in THIS environment. Without it, she's not touching those more-accomplished two-way elite superstars in Las Vegas, New York, and Minnesota--and neither will her team.