It's not my opinion. And I'm not in the SiL is the greatest crowd, either, but it's an excellent epilogue to the whole story. To miss it is like poking yourself in the eye. Watch it once and then decide if it's worth it.
I agree. Another reason not to skip Season 5 is the episode "Day of the Dead", written by Neil Gaiman. Simply wonderful character stories, tying back to earlier events in interesting ways, that should not be missed...