And I didn't like how Rose ended up in that battalion of fighters in the end. Didn't feel anything pointed to her being able to be a fighter pilot before. Just because this all had to make sense for them to have her save Fin she had to be there, and I would have liked at this been more organic.

Also, you have to remember. He didn't kill him. He only thought about. Possibly he was pushed by Snoke with thoughts that began with how he thought the a Jedi would in this moment based solely off the dogma.

And if they made Snoke the big bad all that would have done is make another Emperor. Would have been a poor choice.

Johnson's decisions in this movie is making us rethink the overall arch is more about the rise and fall of the Jedi, who are themselves more to blame than any convienant big bad. They got too comfortable, which led to the rise of a new Sith Lord. It was their mishandling of Anakin that led to his fall to the dark side even more than Sidious who just exploited an opportunity. It was then Luke who turned too much to his romanticized vision of the past (much like us after Episode VI) that allowed this happen again. A new Republic, but no lessons learned from the past means the same things will happen again. Break the cycle Episode VIII asks is and reform a new identity in the here and now.

Now it all comes down to Episode IX to bring it home.

Much like Qui Gon Jinn knew in the first episode all along, that the ways of the Jedi were growing old and that it was time to break free from the dogma of the Jedi and establish a new order.

Star Wars Episode IX: The Next Order

What's the main plot? I ask because both things you bring up are integral.

Id say Rey’s plotline is the main one. While I didn’t mind the Canto bight stuff at all, they failed to find the code breaker and Holdo managed to save everyone without the code breaker anyway

Oh and Rose is borderline Jar Jar Binks bad. Such a atrocious character.

Holdo didn't save everyone. She saved everyone that was left from Poe, Finn and Rose's (especially Poe) disaster of a plan. If they didn't all try to out-Solo Han Solo with a million-to-one shot plan, everyone on the main ship would've lived because DJ wouldn't have heard the transmission through BB-8. All they had to do was trust Leia's judgment (since she and Holdo are their superiors) and take one or two tablets of Ativan. But then you have a third of the story missing and you'd really have a slow-chase through space that dumb people are complaining about being there already and you have no character arcs.

At least no one important died.