I should have expected that this would just be a set up episode for events later in the season. That said, I enjoyed it a lot. Kanan is becoming so much more badass than he was previously; him "seeing" Ezra and Maul through the blinding light (lol) of the Holocrons was my favourite moment, but him solving Bendu's puzzle was also impressive. Quite touching as well when Kanan and Ezra made amends and embraced briefly.
I liked that the Ghost crew weren't completely helpless but were also put back in their place by Maul to remind us that they're not invincible. The reference to Maul's rule of Mandalore was welcome and I wonder how much Sabine knows of Maul from personal experience and how much was told to her by her parents. It was a shame though that they started the episode with everyone already held hostage; I would have loved to see Sabine's initial reaction to Maul once he showed up on the Ghost, although I'll take what we got here and I'm sure we'll get more such references later down the road.
I think Maul's failure to understand that he couldn't open the Jedi Holocron does well to remind us that for all his power, he is still only an old Sith apprentice to a master who hoarded a lot more knowledge than he was willing to share. I don't think he is as wise as he could be, hence why he clearly underestimated the resolve and abilities of his captives.
In terms of the vision, it seems to strongly indicate that they saw some kind of vision of the original trilogy. Twin Suns sounds a lot like Tatooine. I just really, really hope "he lives" is a red herring and we're not redoing Maul vs Obi Wan - otherwise the conclusion of the Mauldalore arc was pointless. I would hope that Maul got over Kenobi once and for all and set his sights purely on the Sith for now. We've seen Dathomir in the trailer which has at least two moons - I know I'm clutching at straws but perhaps Ezra doesn't know the difference between stars and moons. Or perhaps there is something else on Tatooine Maul wants, or there are other planets I'm not aware of with more than one sun.
Overall, pretty good, but also a little frustrating in that we will have to wait to see how this all plays out.