They didnt move over from the PBE the ONE thing that was good in the update (Where her Ult refreshes the Plants Duration)
The HP change on plants is the same as before. They gave the plants more HP but then also upped all the attacks damage to the plants.
Your plants will not live for more then 4s during laning if the enemy laner is there. In Team fights the plants live for maybe 2s if that.
It takes only 2 AOEs to kill the plants (or ONE Q from Talon or Ekko)
What Zyra Mid needs is E to do more damage and add a "Entangled" Debuff to targets that makes slows 10/15/20% more effective (so if your Melee Plants hit and you hit E they are slowed more, that way the animation root of Zyra when she casts E is not an Issue)
Her Plants need to ETHER have JUST Duration (being ~4s, hitting with Q or E adds 2s hitting with Ult refreshes duration and adds 4s)
OR
Enemy attack damage needs to do less by a lot.
-Melee should take 2 attacks to kill plants
-Ranges should take 3
-Aoe should take 4
-Single target Spell should take 3
-Minions should take 8
-Large Minions/Monsters should take 4
-DOTs should take 8 ticks
Melee Plants should ALWAYS target champs in range no matter what.
THEN maybe Zyra Mid would be viable.