Oh this comes really unexpected. I thought it was a joke, but April 1st is already a long time ago.
As I only watched Opeth two times, both on festivals, it wasn't quite THE Opeth live expierience for me, so I always wanted to see them again on tour.
Now that this isn't possible anymore with Peter in the lineup, I'm a little bit sad. And to this little bit comes another tad of sadness because from all things I saw and heard from Peter (Lamentations DVD, GR, internet) he seemed the most polite and most friendly guy to me. Seeing him part is somewhat strange despite that I'm only for one year into Opeth.
Opeth as a band does not exist anymore I think. It's rather a project now.
And projects happen to tear apart after some time. I don't hope for this of course but I think for the guys it's not the same anymore than it was 5 years ago. The "jamming-in-our-own-cool-band" feeling might be gone forever, but if the new team prevails it could be fun (for them and for us).
Good luck Peter!