Lastpass was not proveably hacked. There were two incidents in 2011 - one of which they detected, which looked like data was being accessed in a way that could have been attempts to hack; later the same year somebody reported a cross-site scripting weakness in 2011. In the first case Lastpass proactively required password changes and for the latter Lastpass closed the hole. There was never an incident where data that came from Lastpass was found, or that data was stolen at all, and there have been no reported security issues since then. If you use a strong password to protect your data, your data at lastpass is extremely secure and you are definitely safer than using the same, memorable password at multiple locations, that's for sure. Whether it is Lastpass, 1password, Dashlane, Roboform - I think that you are safer if you use one of these password managers to create and store random, per-site passphrases, and use two-factor authentication wherever you can (Gmail, Dropbox, Facebook, Twitter, AppleID all support this).
If I were using Chrome to store passwords, and sync them, I think I'd create my own separate passphrase to do so, which is something you can set in the advanced sync settings on a PC.