At this point I think the main purpose of the series is to show us the fates of the Jedi who survived the Purge -- that has been its central theme since day one. /shrug
What I do like about this series are the little tidbits that have been sprinkled here and there. ie. how Vader created his kyber crystal and lightsaber, how the Inquisitorius was formed, the numerous former Jedi that are part of the Inquisitorius, Luke finding Jocasta's Jedi archives in the future, lists of surviving Jedi, etc.