So I was having what's at this point become a fairly common conversation for me:
Idiot: "I can't believe Cassandra Cain is your favorite super hero. She's such a mary sue."
Me: I don't think you know what that word means. And even going by the actual definition, Cass is far from one. She's the world's greatest fighter, yes, but she struggles in all other areas."
I then went on to go on my standard rant about all of the things that make Cass a brilliant character.
However, after the conversation, something hit me.
She really doesn't have a complete 'weak spot'.
We all know she's the best fighter. Within her solo book, we saw a few times that Bruce and Tim were training her as a detective, and, outside of those dedicated issues, we also saw an example of her skills when she was able to deduce Superboy's secret identity and find him. And as far as leadership skills go, while we didn't get to see much of them, there had to be a reason why Bruce trusted her to lead the Outsiders after he 'died' in Final Crisis.
For a long time, I have maintained that while Damian would be the best single replacement for Bruce, Tim and Cass together would make the perfect Batman.
This is no longer the case.
Cass doesn't need Tim to be the best. She just needs a little time and experience.