How I'd fix season 4 of stranger things:
El doesn't get arrested or taken by the government.
Mike and Will get taken by the government.
El never gets her powers back but she learns how to live without them and how to fight without them.
She still has to get her memories back that she repressed.
Argyle and Johnathan help her get her memories back.
El and Jonathan sibling bonding time. El and Johnathan bonding over there relationships with a Wheeler and both realizes it's better to stay broken up.
Johnathan calls Nancy to and somehow they figure out the pen thing.
Johnathan keeps lying about what happened to Mike to Nancy on the phone.
Will gets taken by thr government and this is the start of him getting his powers. Mike is taken too because he wouldn't let Will go and can be used as collateral to control Will. So they basically stay together most of season 4.
Steddie actually happens instead of implying Stancy and Steve is canonically bi or is realizing it.
The guys actually go to Lucas basketball game. But last minute and they get to see Lucas score and win the game.
Eddie didn't force the kids to come to the dnd game or he ended it early do th3y can be there for Lucas.
Eddie and Steve have meet cute and the end of the game. It gets interrupted by Chrissy who's there for the drugs Eddie has at his house. Same thing with Chrissy dying happens in canon.
Eddie admits he has a crush on Steve, and doesn't ever bring up Nancy.
Will and Mike have to deal with being trapped with Dr Brenner. Them only having each other to rely on is what finally gets the to talk and be honest to each other.
Dr Brenner explains how the upside down may have given Will powers.
Mike realizes a lot of stuff somehow about Vecna/Henry and that Dr Brenner might and helped im Will getting taken
At same time El is remembering about Henry.
Will gets his powers when Mike is about to be shot by Dr Brenner.
Mike also figures out that Dr Brenner also was giving information to the Russians. Mostly on a gamble so he can get El back. But than he finds out that she's powerless now so he takes Will.
Will uses his powers to save Mike, kill Dr Brenner and free him and Mike. They end in the desert are about to kiss when Johnathan and El interrupt them.
I fix the plan slightly where Max ends up fine but Eddie is the one who ends up in the coma. Max just ends up needing to be in a wheelchair and or use a cane. But they still fail to stop Vecna.
Will still hasn't fully figured out his powers so he has to have El guide him to help Max. El's pep talk and her telling him that she cares about him that he's her brother motivates Will. Will realizes happy memories based on love are stronger and uses them to fuel his powers.
Mike meanwhile is holding tight to Will's hand.
El and Mike properly break up.
The painting scene happens on the way to the pizza place but Will says its from him. Again Mike and Will almost kiss but get interrupted again.
Steve is the one who brings Eddie back with them. He checks if Eddie has a pulse.
Max and Lucas still have their emotional scene but Max wakes up. Instead of her looking like she did in canon. Vecna only managed to break legs. The angst is Max telling Lucas she can't feel her legs.
Everything else is the same for the ending for the most part is that El and Mike are officially broken up. Will doesn't know. Eddie is in the coma instead of Max. Max might not be ever be able walk again and Max has to deal with that. But for now she's happy she's alive but upset their plan didn't work. Nancy is the one to hug her brother because Johnathan finally told Nancy about Will and Mike getting taken by the government. Johnathan and Nancy officially break up. Will shows his mom he has powers. And he and Joyce hugs. Mike and Will have their heart to heart scene.
Again El doesn't get her powers back. Tells everyone about Henry but learns to be happy without them.
Steve is the one sitting by Eddie's bedside whenever he can.
Also Robin and Vickie will accidentally hold hands. Steve witnessing it makes him smile but in a melancholy way.
Dustin still tell Wayne that Eddie is a hero.
Steve has to constantly stop people from hurting Eddie and Hopper makes his return.
Mike who stole several files from the government. Finds his family might be related to Vecna. But it's so vague we won't know for sure till season 5.
Main points of the season: El learning she doesn't need her powers to be strong and that she can have a life and stand on her own without them. Will learning how to deal with his powers with such negative connections while also dealing with his feelings for Mike. Steve realizing he might be bi on top of all the horrors and that Eddie almost died on him. The town is still after Eddie and the Hellfire club but Hopper is back and he's going to protect all his kids. Max happy to be alive but angsty over her legs and worried that she'll be a liability. Lucas maybe blaming himself a little over Max his legs. Mike dealing with his feelings for Will but also a lot of the information he managed to get out of the government lab.