How did people get Chandra so wrong?
Also, is the card by any chance playable in Modern?
If you're referring to it not seeing much play after all, then:
* Planeswalkers in general are very weak against vehicles, and Smuggler's Copter in particular. A planeswalker that can't establish permanent presence like Gideon or at least get you a guaranteed card won't be worth much against a deck with vehicles.
* It actually does work very well against control, from what people are saying.
Now that the Pro Tour has shown that vehicles aren't
quite as ubiquitous, I expect people will be more willing to try out Chandra in Standard, at least in the sideboard.
I think people are trying it out in Modern, but we'll see.