Why no, people don't just like Sylvie for T&A: https://www.mmo-champion.com/threads...ery-Cinematic/
Why don't they just coalesce all the radiation into a giant radiation monster and fight it outside of the city?. That seems to work lol
"You see, there is balance in all things. Wisdom etched in our very fur: Black and white. Darkness and light. When the last emperor hid our land from the rest of the world, he also preserved...our ancient enemy, the mantid. So it is with your Alliance and your Horde. They are not strong despite one another; they are strong BECAUSE of one another. You mistake your greatest strength for weakness. Do you see this?"
They could also possibly use some cloud seeding or chemical product disseminating copter machine, able of spreading decontamination product over all of remaining radioactive areas.
A bit like the mutagen-disseminating machine in the last Batman/TMNT crossover film.
"We're more of the love, blood, and rhetoric school. Well, we can do you blood and love without the rhetoric, and we can do you blood and rhetoric without the love, and we can do you all three concurrent or consecutive. But we can't give you love and rhetoric without the blood. Blood is compulsory. They're all blood, you see." ― Tom Stoppard, Rosencrantz and Guildenstern are Dead
I have never liked how that was the one answer to the Blight that the Alliance found, even since they have known Blight's existence for a very long time and could have very well found technological, chemical and other magical counters to it. It could have been another moment where Gnomes or another underused Alliance race could have shined.
Given that Lordaeron remains uninhabitable even now, as they were still trying to clean up the Blight in the 9.2 quests where you follow Calia to Brill, it seems like Jaina's freezing of the Blight was only a temporary measure that allowed the Alliance to invade Capitol City but little else. While freezing the Blight might allow temporary access into Blighted areas like Capitol City and Southshore, it's not a permanent solution - as freezing Lordaeron perpetually would be a nigh impossible task.
That being said, it's likely that the Blight could be undone by any number of alchemical processes since it was magic and alchemy that created it in the first place.
"We're more of the love, blood, and rhetoric school. Well, we can do you blood and love without the rhetoric, and we can do you blood and rhetoric without the love, and we can do you all three concurrent or consecutive. But we can't give you love and rhetoric without the blood. Blood is compulsory. They're all blood, you see." ― Tom Stoppard, Rosencrantz and Guildenstern are Dead
Well there was lots of time for the Alliance to study it and find an alchemical counter to it, as well as Gnomes and dwarves finding other magical and/or technological means of protection or elimination of it.
Draenei also could have worked in this area, due to their experience with the Red Mist that turned many of them into Broken.
With the Mecha-gnome in their ranks, it should not be that hard to find a solution, and I believe that they will most likely find it, just fear that it will be done out of game and in game it will be the same till they decide to use it for an event.