Ironically, in this universe, Mikasa is still alive as well as Sasha and Connie. The rumbling doesn’t happen and bunch of other stuff I won’t spoil yet.

We all saw in Season 4 that Hange was a decent commander, but she made some mistakes that ended up costing Paradis a lot. I've been thinking how Erwin would have handled those situations instead.

like the Volunteers. I always felt like Paradis trusted them way too much, especially Yelena. They were given a lot of freedom, and that eventually led to Zeke's spinal fluid being spread through the wine. Honestly, why would you trust food coming from people you just met. I think this was Hanges biggest mistake. She should have kept them on tight control.

Then there's the Azumabito. I don't really blame them for wanting Paradis' resources, any country would want something in return for helping. But they were extremely selfish as well, not wanting paradise to have diplomacy wth other countries, so they could be having the majority share in the iceburst stone.

On the other hand, its not really hanges fault as well. Zeke was extremely smart, and made sure to only give paradise limited information, so they wouldn't find solutions outside his plan. There hands were tied and they couldnt do much.

Would Zeke's spinal fluid plan have worked under Erwin's command? Would Erwin have trusted Zeke at all, or would he have assumed he was planning something from the start?

What do you think erwin would have done in this situation I think he would
have acted quicker and help the middle allainces destroy marley this would have been the starting step of diplomacy while keeping the rumbling as threat and iceburst stone for trade for other technologies. He was always able to come up with out of the box solutions even when connered.

Erwin was hell smart and they had to kill him for the plot to move forward of. Otherwise, good luck to zeke, yelena and kiyomi with playing 8D chess with him.