Zyra Isn't Viable
Playing Zyra, and her passive is useless, her plants aren't exactly strong unless changed to start attacking upon right clicking a target (similar to Azir)
A good passive rework (for example something similar to Illaoi) and better control of the plants (similar to Azir) would make her viable once again.
Passive: Spawns seeds at random in a small proximity Scaled by level: 1: 5 seconds 6: 4 Seconds 11: 3 seconds 16: 2 seconds
Passive 2: Aura of Life (Ish) All living plants/seeds are kept alive in a moderately sized area. once she steps out they begin to decay, if she comes back she nurtures them (slowly restoring their "health")
Q: Kept the same + Reduced Armor/MR (10% max(Maintained by plants attacking?)) (maybe add a poison DOT to the plant upon spawn)
W: Same but stack to 5 instead of 2 and start at 1 (1/2/3/4/5) + When a seed is stepped on, Slow -20% (flat) 1 sec(keep the CDR)
E: Root last maybe a little longer +.25 secs?
R: Complete Rework! Suggestion: Stranglethorns Zyra causes vines to bloom out from the target location, rooting those caught in the vines for the duration. When the vines reach the end of the radius, they suppress all units in the radius and pull them to the original cast point as the roots retract.
However these are all Ideas, take them as you wish, I hope to see some rework to Zyra, though her playstyle is good, and her kit is fun, There needs to be some Work done, as she wasn't touched (except the fix in 5.18) since 3.13. I hope to see her viable again, just don't make her too strong c: