The hardest reworks are yet to come...

They were called "divers" and were supposed to be looked at after the assassins if I remember correctly. The most problematic aspect: extremly binary due to either sitting on your face and you are dead while undodgeable basic attacks shred you into pieces, or they can't do that and have the value of a melee minion with a minor gimmic.
But how I see it, these champions cannot be fixed with a simple number shifting like most champions in roster upgrades get. Every single one would need a unique ability pattern that is connected with their basic attacks, because the dude with a broadsword is not gonna fight like the dude with the spear and they both shouldn't play like the eggplant with a lamppost or someone with four telekinetic blades.
Also from a game-health perspective that is clearly desired as it a) has inherent counterplay and since b) ability based champions are way more easy to handle when it comes to individual balance.
All that requires new animations of course, and given the age of the characters one might as well go the extra mile to a VGU.
So for this to work we would require at LEAST four potential VGUs at the same time - and we all know how long a usual VGU takes and there are only two pots going currently (unless you outsource it into the skin department and then put it behind a paywall
). Unless there is a massive shift in how ressources are allocated I don't have any hopes for the following roster upgrade tbh.