The pipe bomb was clearly Punk letting off some real steam in the context of a worked promo that advanced his character.
I think he may be doing this again. I don't doubt a crusty asshole like him is legit bothered at Page not listening to advice, and is using it in a way to potentially do business.
I just don't see him, even as grumpy as he can be, flushing away a situation where he's a top draw and most popular person on the roster.