Some fans have actually been particularly excited about the prospect of seeing Harvey’s therapist, as everyone is quite curious to see what kind of person is able to keep a strong mind like Harvey’s organized and in check. Of course, Harvey himself will find himself facing some difficult issues, so it’s not like his mentality is indestructible.
This season is actually likely going to bring out the more human side of him, showing him as a person with his own flaws and problems, not the perfect lawyer he has been throughout the last seasons.
The conflict with Donna could especially add to that, and the plot of season 5 is going to be very exciting if the writers play it right. There are many subplots that fans are interested in seeing explored in detail, and the writers have a lot of work on their shoulders right now, because they will need to figure out which of those ideas should be implemented and which should be cut.