So not to spoil anything but things aren’t looking good for Big G right now. Usually when funny character need a opt out they are shown in an aftermath cutscene and turn to nothing for some time until a well needed comic relief plot is in place to heel their return. And we still don’t know what he did do while he was in the Shadowlands making deals with the Brokers.
I really cross all fingers and toes he actually thought about doing his own escape pod now.
It’s almost like he’s been a villain since he was introduced or something.
Magatha killed more people then he did yet we made up with her for the good of the world. He did nothing so bad that was undeniably iredeemable. For that we have much worse contendors.
You wouldn’t understand. You lack the basic moral fiber.
I am not against killing villains. I am against offing folks whose worst offense is money exploitation.
If you don’t want to kill him, I’ll kill him twice—one for me and one for you. Walking through time and making sure he really dies is easy.
He is the goblin philosophy dialed to 11. Sure he had to be a mafio boss while doing it but he looked good at the top.
That is a very pretty way to describe his attempts at enslaving the Bilgewaters in the middle of a cataclysm. Just to name one of his many crimes.
He’s always been a troublesome goblin, ever since Kezan. I think it’s only gotten worse over time, exploitation, slave-like labor, extortion.
Why wouldnt we try to kill him? The guy is legit using azerit for bad things and even harming the world
So did Genn and Rogers and Jaina but they were never punished for it. I am sure Jaina has killed more Horde members then Gallywix did to fellow goblins.
Forgot Gallywix was in the Shadowlands, curious if he prepared something if he does perish. 
Extortion and enslavement were the first things we ever saw him do!
Great, when will the alliance send Jaina’s head as reparation for the dead Sunreavers?
Honestly, would help avoid needing redemption for Kael’thas considering he did very similar stuff to the Draenei. 
edit: I’m still hoping Kael’thas shows up for Midnight. 
Kael’thas is dead. Jaina isn’t.
dying is just a small detail
Was odd Jania survived her large raid fight in the Battle for Daza’alor.
Funny is both Gallywix and Mekkatorque show up for a patch to be nearly killed off.
they would never kill an alliance chief.
To answer your question, from what I understood he’s essentially enslaved Undermine under his boot, and the goblin people have risen against him.
We did not make up with Magatha. The Earthen Ring entered an uneasy alliance with her to deal with the Legion, which seemingly ended after the war.