I'll be honest, i find her perfectly fine when its not a Celtics/76ers game. She's otherwise pretty fair.
I don't really think there are many, if any, nba tv people who offer great game insight. That's not really their fault, the game moves so fast that by the time you explain some tactical wrinkle the teams have went back and forth like 4 more times. NBA tv people need to keep up with the action, offer occasional insights, and be convey the feel of the game flow to the audience. She does all that fine.