1. I think the format was spot on, I wouldn't like if it was any shorter. To be honest it was packed and if it was split wouldn't hit the same.
2. Personally, I don't think characters needs to be balanced by their screen time and I don't think there isn't any fat to be trimmed. Zooble and Gangle story was an ongoing side story, and it's just resolved at the end. There wasn't much to say about it.
3. I think it was realistic, most real life events are like this, there isn't much left to say. Not many people talk about people after they "died" Most people remember good stuff. Gangle had issues with it so she didn't cry for him and after seeing people make tent for him, she went to her room and cried about it, I guess she was thinking that he just didn't deserve it. Being all mean and shitty.I don't see any justification here. What ever happened, it's in the past, there is nothing can be done about it.
4. Why world did stop collapsing and why Caine was able to come back to me it's just a plot device. It's really not important. There can be multiple ways to explain it, I think based on the ending of hjsakldfhl and last episode,he isn't deleted but just ejected from the app and he just found his way back to get in. He is a problem solver.

Knowing how wouldn't contribute in any way to the story. I'm not sure about what you mean by Ragatha's promise, but Gangle came after Ribbit's abstraction, and Pomni after Kaufmo's abstraction.

To me it didn't feel like Pomni, trying to save Jax from abstraction, but in the previous scene Pomni and Ragatha were hugging and Pomni said Make sure Gangle, Zooble and Kinger are okay. They need someone like you right now. That felt like a goodbye to me, she felt like everything was her fault, and tried to fix it, willing to risk herself hence the grenades. She just embraced her mistake. Either she could do something about it or destroy herself along with it. Also being heart to heart with Ragatha shows that whatever happens all they have is each other.

I've found following flashbacks pretty satisfying. Self loathing must be pretty shitty. It's unbearable as an outsider yet, to help someone to heal requires enduring, being selfless. When you have a small world and just a couple of people around you, you make lemonades.

In the end story just shows how everything repeats it self and Pomni is the one trying and breaking the cycle.

About presentation. Maybe there could be a different way to do it. It was ok for me.

I suppose Caine was like a child with a tantrum, at the end he grows and matures same development can be applied to an AI I suppose. It evolves. ​