Of course, I’d argue that KyoAni should do every Key series that got adapted by some other people, such as Little Busters! & Rewrite because KyoAni has a capable director, animation team, and stable budget. Not to mention they have very suitable animation for Key. Just thinking of Rewrite being animated by them still gives me chills because of how beautiful it would be.
But for Planetarian, I’d argue it shouldn’t be done by KyoAni. With Planetarian, it’s more about the story than the scenery. (While other Key stories are very much about scenery). Maybe KyoAni back in their 2000’s day would be perfect for Planetarian, because Planetarian is set in a post-apocalyptic world, meaning having dark scenery (which is what KyoAni had back then), but KyoAni now is more Bright and colorful. Not to mention they put a lot of focus into the eyes, but for Planetarian, it’s striving to stay away from the eyes until the final scene.
If we talk about A-1, I think I’ve only seen Plastic Memories, SAO, and Anohana from them. I haven’t seen much from them so I won’t say much about it.
I think the animation studio picked is perfect. I’ve only seen Inu x Boku SS, and it seems like a very-fitting animation for Planetarian. I don’t watch their new works so I can’t say if it still carries that. From what I saw in the Planetarian PV (which isn’t much animation), it looked very fitting for the scenery in Planetarian.
For Key works, I’d argue that it needs Gorgeous animation because of the scenery they put out in their stories, but Planetarian is really the only Key story that I’d argue about not needing to have that animation that gives details in hair strands, or in the eyes, or movement. Planetarian’s setting and character designs is really something that animation studio’s who don’t use bright colors, should do.
I guess Harmonia’s setting is set in the somewhat same situation, but Hinoue’s character designs makes it feel like it needs to be a animation studio who uses bright colors because of the eyes, and especially hair if it ever gets animated.