Knights of Sidonia has great visuals and lore ideas but boring storytelling and characters.

Argento Soma had interesting aliens and story but the robots were pretty basic looking.

Bokurano has great visuals and very interesting story, but it has some heavy topics. (Epstein related…) Also I think the manga is better, but the intro to the anime is worth watching just for the song.

Fullmetal Panic has great robot battles, but you might not like the combination of highschool sillyness and serious war story.

Gankutsuou has wonderful visuals and only one Mecha battle in it, but that qualifies it ;). It is an anime adaption of Count Monte Christo

Kenran Butou Sai: The Mars Daybreak has a nice combination of adventure setting and Mecha fights.

Kind of. Spoiler free version for Rebuild: Shinji grows up and learns to take responsibility.

Anno is not involved as far as I know. But yes, the Rebuild movies gave the whole series a proper ending. Continuing now has the very high chance of destroying that, in my eyes.

Honestly I’m annoyed at Shield Hero for the possibilities they wasted. Make a defensive hero? Emphasise the importance of support and team work in a fight instead of raw power on a single individual? Naahhh, screw that! Let’s give the support hero the uberpowerful aggressive mode and make him the messiah and single saviour.

Arrrghhh, whyyyyy?!?!??

Plastic are made from fossil fuels which are from primordial plants. So still organic according to your definition. Just a few hundred million years since it was alive.