They should just revert the rework. It failed in what it was supposed to do, and the only way to make her not a perma ban is to Evelynn/Kalista her and make her completely unplayable by either halving/quartering her damage, or by doubling her mana costs, or by just breaking her kit in general. She had counterplay before. If you denied old LB a kill in lane, she didn't snowball and was easily dealt with later because she didn't scale as well as most AP mids.
She has so many options now, and you can't even push her to turret anymore to deny her because of her stupid waveclear.
While I get a lot of non-LB players would rejoice at the idea, dumptering a champion because the devs themselves failed at a rework is just a stupid solution.
I was an Evelynn main way back in the day when morello decided the solution was to just break her completely, leave her a troll tier champion for over a damn year, and force anyone who was dedicated enough to play her to get 9x reports every single game they played her.
I lost my first account because I wanted to still play the champion I sank hundreds of hours to, and accrued so many reports, even when I carried, that I got a perm ban. Please don't do this to LeBlanc.