I've stated many times that in my mind, Jesper's departure signaled the end of the In Flames I knew. Even before he left, he had been reduced from the core songwriter to a disinterested bit player, and the last time I saw them live with him in the lineup, my brother turned to me during the show and said "he's not going to be in the band much longer." It was obvious how little he cared, how utterly uninvested he was in their new sound, and how distant his creative vision was from that of the rest of the band.
Well, while his departure was officially tied to his problems with alcohol, it seems that he has now gone on record validating my take on the matter. This article provides the relevant details.