I'm not sure if it's official about Per, but I'd like to see them add another member (keyboardist), especially one who can write music. I'd also like to see Peter and Mike write more music together, I think that would be awesome.
As far as a new producer, why not get Opeth to produce it themselves and not get a producer? I like Steve Wilson and all, but Porcupine Tree is Porcupine Tree and Opeth's Opeth.... I'd rather see Steve and Mike write songs together instead of write under each others names...