The big draw for Lastpass is twofold: 1. Having your passwords available wherever you are. 2. Having Lastpass fill them in for you on webpages.
Lastpass is also good in that I don't have to keep entering my master password every time I fire up my PC, only when I move to another device.
Keepass may be more secure but it's a heck of a lot less convenient and more damaging to workflow.
Lastpass ain't perfect, and this is a worrying report. But if there's something better than Lastpass out there I've yet to find it.