Nnnnnooooooooo! That was so much fun! Riot, I do not ask for much, but please... We beg of you! Let Rek'Sai have this one thing. She needs a good spammy emote. It is core on her kit, and to her identity as a champion! The fact that the smokescreen is gone might add clarity to the air around her, but she's not healthy without it. Okay, I think think that's enough Riot buzzwords. Now to see if the bait worked...
Edit: Additionally, other champions that have spammable emotes (See Vel'Koz' "Oh Darn!" /dance) may become oppressive in the future, if they do not have counterplay. Rek'Sai's smokescreen can hide her from these risky champions' emote mechanics, adding balance to the game.