They really cleaned house in this one. Hober, Salvor, current Cleon dynasty ( mostly), Bel Rios.
Where to begin? The most heartbreaking storyline was Demerzel being locked in servitude as well as being the puppetmaster at the same time, unable to break free of that cycle installed into her by the very people she actually is programmed to love. Dawn escaping ( for now) to start his own line was not unexpected but his talk with Demerzel was wonderful to see. Her decanting an all new generation of Empire at once and them coming out of the tubes like zombies or rather puppets and giving off the impression they're asking for orders is just a visual representation of the entire Empire dynamic. Though how she got her hand on the Radiant i don't know, i really am sometimes struggling to remember details from a week or weeks before.
Hober actually pulling off Hari's master plan was a nice twist, freeing the Spacers from Empire rule albeit at a very high price. It was obvious that Bel would refuse the command but i was not expecting a throwdown with Day, that was just icing on the cake and him using that tech to switch position ( still don't understand how that works) and getting the poetic image of Day hurtling towards destroyed Terminus was so satisfying.
Back with the Mentalics and Hari/Salvor/Gaal i wondered what happened with Telem and expected something to happen and i was right, she was able to transfer her consciousness and do damage but that was her last action. The Second Foundation was established and is now preparing for the coming fight against The Mule. As much as they reduced the cast in this finale they obviously want to keep Gaal around as an apparent thread connecting all the seasons, we will see if she survives The Mule and they find a new way for her to make a time jump.
While the planet Terminus is destroyed, so much for any theories we had, the actual important part, the people, were saved by Hari's Vault which turns out to be a spaceship too - that thing seems more like magic than anything and i wonder how this was constructed by an Empire already in decline. Now it's off to find a new home for Foundation and to prepare for The Mule on their end.
Really great season finale for what i considered a mostly convoluted and muddled season but the last few episodes turned that around quite well. Now i'm looking forward to season 3, whenever that will drop given the strike situation.