I think its time that Zyra got some buffs.
Shes never been competitively viable in her intended role, mid. Shes never been popular in her intended role, mid. Shes never been particularly strong(post release nerfs) in her intended role mid She got massively nerfed because her supporting was 'too good' with no compensation for mid.
She really doesnt need all that much to be in a considerably better state. Namely increase her base health, as its currently one of the bottom 5 lowest in the game. Also increase her move speed by 5-10. There is no reason why a mage with no mobility should have the lowest base health and lowest move speed.
Plenty of other mages with CC have higher move speed and more base health. So her having CC is no excuse.