Pep had his rant cause he knows what his doing, and what reaction he's looking for. He's to calculated and smart and has been a manager and a player for most of his life so that rant was planned on his part.
The other factor no one seems to mention is possibly Pep signed the extension for the rebuild that he knows is coming, and has already started before this season. Pep has a project, the board would be in on it as well, so nothing coming is a shock, let alone to someone as good as their craft (not perfect, no one is) as Pep is.