Not a satisfying finale to the season at all. I think this season overall was more enjoyable and better than season 5 as there were no sperm or dragon episodes in it surprisingly! But season 5's finale was definitely way better than this and they decided to allegedly keep the main storyline with Rick Prime for the seventh season, so we're probably gonna get a continuation in the 11's season hopefully!
The premise of the episode itself is decent I guess though it still relies on the exact same thing all of modern SW have been criticized for, but nevertheless it's a decent idea for at least half of an episode, I'm just not sure about it being the main plot of the whole episode. Because honestly, it felt like they just had this one idea, or let's say a shower thought most people have had about this idea and they just ran with it without it having a plot that feels like an actual episode of Rick and Morty.
Like it just feels like I'm watching an incomplete story about this plot. Compare it to the last episode's plot and this whole episode feels like 1/3 of that plot. This is a rare instance where the "episode ended too fast I didn't even notice it was 20 minutes" is not a compliment and a negative because there wasn't much substance for a finale.
I guess there is one other subplot about Rick himself which starts out ok but doesn't really culminate into anything special or substantial other than one funny slow-motion scene.
It is especially more disappointing when they had a whole season with random stories and no mention of Rick Prime making you think that this last episode is at least gonna have more than what we got, but no, there's nothing and we have to wait another year or two to see if they're actually going to stick with a real coherent plotline or if they're just gonna drag the story to season 10 and sprinkle a background cameo and reference every now and then and then at the end we're probably not even gonna have a whole 20 minutes worth of storyline with Rick Prime.
They just did some Rick Prime at the beginning of the season, then they decided that "eff it, we can't be f'd, we leave it to future us to come up with some ish about Rick Prime when we're gonna write season 7 or 8, so let's just mention it a couple of time, I think that's enough."
Anyway, this episode was just decent and the idea while interesting at first, they don't really do anything that fun or more interesting with it and it feels like a regular episode they put in the middle of the season not the finale. The idea itself and plot b could've had more interesting revelations and conclusions, but they are just mediocre in the end.
The episode itself is fun and compare to some of the atrocities of season 5 and previous seasons it's clearly a better episode and more fun, and by itself it's a 7 or an 8/10 episode, hell, I would've given it an 8/10 if this was episode 5, but as the finale of this season especially after that first episode? It's unfortunately disappointing and gets a 6/10 from me.