Well, this is quite amusing!
Newest reworks being urgot, swain, aatrox, irelia, nunu, and akali
Urgot: was generally low teir until quality of life changes that set him as too much of a reliable pick.
Swain: IS this guy a champion? Haven't seen one in god knows how long, very strong in competitive formats by design, is currently spending a long time in the gutter, will probably need some work.
Aatrox: competitive nightmare, soloQ monster, out of meddler's words will 'very possibly' need work down the line to keep him from murdering everything.
Nunu: Treads a fine line in the meta, willing to bet he will see alot more attention from pros than from anyone else, or until meta shifts to favor tanks.
Irelia & Akali: Fine champs before reworks with certain toxic elements, completely overtuned abominations after reworks, diving ever more developer time to fix.
Riots new design philosophy seems to have a glaring issue, they want every champ to have certain op elements, but are unable to change the game fast enough to follow through completely and are left retuning these elements for countless hours, but hey, whatever fits a paycheck?