My analysis of LastPass (correct me if I'm wrong): if your master LastPass password is unique to that site, you are likely safe, but if it's one that you've reused on other sites (check http://haveibeenpwned.com), then you should be very worried.
LastPass password cracking rate on the order of 100k/sec, what various sources tell me. Given the complexity rules for passwords, you are safe from brute forcing. There is some small danger from mutated dictionary attacks, but still adversaries can try only a few billion.
@ErrataRob except they leaked the entire user site history to help send targeted phish for. It's over for Last Pass as a technically competent company
