Note: I was lucky to be able to view an early version in german cinemas with german subtitles. Subtitles are rated but not included in the final score.

I was having problems deciding how to score this movie, and how to include both bad and good parts. Therefore I will rate this movie in 10 categories, so we can get a very unique look at it:
Plot, Visuals, Animation, Songs/Performances, Character distribution, Character development, Outfits, Hair, Comedy, German subtitles. Understanding this review will require general knowledge of Love Live! Sunshine!!.

Plot: 2/10

The Story consists of 4 very loosely related sub-plots, which are not completely sequential.

Keeping Aquors together. 4/10
Finding Mari. 2/10
Keeping Saint Snow together. 5/10
Saving the School, again? 1/10

I did not appreciate the plot at all, many parts felt either generic or copied from earlier Love Live!. There where several nonsensical parts, similar to the end of Season 2 of Sunshine. What I enjoyed was the execution, the characters are very captivating and can kind of hide the non working plot and convince you of the power of School Idols being what holds reality together, otherwise there would be no way to overlook the huge amount of plotholes.

Visuals: 7/10

There where lots of good shots, the art style wasn't super refined but absolutely ok. Background characters looked a lot better than in previous instances. Facial expressions and eyes were excellent. Light and bloom effects looked ok. But there is still one big concern in all idol animes we have not talked about yet: 3D models.I found the quality of the 3D models wildy inconsistent this time around. Therefore I will go into detail on this in the "Performances" section.

Animations: 9/10

We are talking about the movement of characters here, not image quality. I felt that Animation and expressiveness of the characters were excellent. Everything looked fluid and arguably realistic. At no point was I disappointed by the way characters moved. This movie had no fast action scenes, which are normally the best way to detect animation flaws.

Songs/Performances: 8/10

An idol anime rises and falls with it's songs and performances. There were 5 perfomances and a vocal insert song/montage by all of Aquors.

First Performance: Bokura was Hashitte kita Michi...
Members: All 9
Center: Chika
Topic: A song about continuing Aquors even after the third years leave. End with Chika having a Solo and the Center.

Song: +
Outfits: o
Animation: o
Models: - - -
Rating: 4/10

Second Performance: Tousou Meisou Moebius Loop
Members: Dia, Mari, Kanan
Center: -
Topic: A song about running away from PLOTHOLE. Blatant copy of ? <- Heartbeat.

Song: +
Outfits: +
Animation: ++
Models: o
Rating: 6/10

Third Performance: Hop? Stop? Nonstop!
Members: All 9
Center: Mari
A song about Idols being more important than the social norms of Mari's Mom.

Song: ++
Outfits: +
Animation: ++ +
Models: +
Rating: 8/10

Fourth Performance: Believe Again
Members: Saint Snow
Center: -
A song about being strippers? Police themed Strippers?

Song: ++
Outfits: ++ +
Animation: ++
Models: ++
Rating: 9.5/10

Fifth Performance: Brightest Melody
Members: All 9
Center: You? Kinda?
A song about shining? In the loosest sense.

Song: +
Outfits: ++ +
Animation: +
Models: 0
Rating: 7.5/10

Sixth Performance: Kiseki Hikaru
Members: All 9
Center: -
A background song for building a concert Stage.

Song: ++
Outfits: x
Animation: x
Models: x
Rating: x

Last Performance: Next SPARKLING
Members: 1st and 2nd Year, then all 9
Center: 3rd years
Another song about Aquors being eternal.

Song: +
Outfits: ++
Animation: ++
Models: +
Rating: 8/10

Character distribution: 1/10

A prominent critique for Sunshine is that certain characters get way less lines and screentime than other. And the movie only made it worse. So I decided to kinda count.

Characters by lines:
Chika > Ruby > Mari >> Yohane >> Riko > Tsuki(You's cousin) > You >Kanan > Dia > Hanamaru

The first three probably had as many lines as the rest combined. But that is not the only problem, if we look at only important lines, lines that progress the story or a character, we get.

Characters by important lines:
Chika > Ruby > Mari >> Riko > Tsuki(You's cousin) > Kanan > You > 0 = Dia = Hanamaru = Yohane

This is NOT JOKE, in my opinion Dia, Hanamaru and Yohane said exactly 0 lines that contributed anything. Furthermore You now falls behind Kanan. Yohanes only lines were Dark Angel related, Hanamarus Food and Dias dotting on her sister.

The distribution of importance is just disgraceful.

Character development: 2/10

Characters that had development shown:
Ruby, Leah, Shiitake, Mari?

Characters that probably had development, but not shown:
Mari's Mom, 1st and 2nd years.

Shoutout to Kanan for being as stale as wet cement.

Outfits: 8/10

Chika: - -
You: o
Riko: +
Ruby: ++
Hanamaru: ++
Yohane: ++ +
Dia: ++
Mari: +++
Kanan: - -
Leah: ++
Sarah: ++
Tsuki: +

Yohane was soooo cute. Mari looks great in leather. Kanan looked like she robbed homeless for her clothes. Chika took the stuff even Kanan wouldn't steal from the Homeless. Turns out, stripper outfits are hot.

Hair: 8/10

Chika: -
You: +
Riko: +
Ruby: ++
Hanamaru: ++
Yohane: ++ +
Dia: ++
Mari: o
Kanan: o
Leah: +
Sarah: +
Tsuki: o

Did I already mention how cute Yohane looked? Dia had a High Ponyttail, very nice. Hanamaru rocked tradditional braids + glasses.

Comedy: 9/10

The humor is really on point. A mix of references, slapstick, witty retorts and sticky situations left the cinema laughing every few minutes.

German subtitles: 0/10

There were huge amounts of typos. Aquors where always referenced with an article, the Aquors instead of Aquors. Fontsize was small and not very well stylized. The story ocassionally made no sense, details seem to have been omitted. Weird punctuation appears out of nowhere.

Summary and final Score: 4/10

In total, I found the movie amusing and entertaining, but if I look any deeper than the absolute surfce it falls apart. I would watch it again, but I would prefer to be very drunk. The songs and performances are great but the rest is clearly below average. Some characters got shafted, AGAIN. I really can't stand seeing Chika anymore. This leads me to give it: 4/10