Their new singer is really really good. Although I'm sure you'll say that's not the point.
Anyway, this sucks. I wonder why he's leaving the band? It seems really out of the blue and strange, and it leaves no answer about whether the band will continue in any way. It would interesting to hear what a new vocalist would bring to Pennywise if they went that route, if only cause Pennywise hasn't changed all that much in 20 years and they could be due for a shaking up. But I'd rather it be something natural and not because of something like this.
I agree, the new singer is decent. Now if only Jerry Cantrell would get over his drop-D tuning, they might come up with something original.
As far as Jim goes, I can't imagine the band would sound that much different with a new vocalist, but Jim's voice was a huge part of their trademark sound.