He felt that there was a lack of indication of direction with LSK. He cited a lack of a roadmap, and a general lack of desire by the dev's to generate value in the coin. He had some fair points, and some outrageous ones. To me it seemed more like he needed the funds he had tied up in it for something, and couldn't wait to turn a profit.
Probably why they say never invest what you can't afford to lose.
if you scour posts at r/lisk you can probably find who I am talking about. He certainly wasn't a friendly person. :)