As long as champs like Yi are viable, Malzahar will never stop seeing pro play no matter the nerfs.
As long as you have hypercarries that require more skill to play against them than it needs effort to play them, champions with a reliable point&click lockdown will ALWAYS be mandatory.
I just used Yi as an example as that one just shows up game after game after game since I reached plat, but it might as well be another hypercarry.
Wouldn't be surprised if Lissandra would see more play too in the next time...
in pro play?