Interesting......
I feel the opposite though. Time and the Terrans healed Glorie from the wars of the past. The Zor flowers were able to grow again. Sure you can try to stop the flowers growth, but a ship crashing into a large patch of them and spreading them all over would make it difficult to do.
The flower's growth is not really explained to well. I can see how the arguement could go both ways. Maybe the ship did kill them maybe it didn't. The last Episode is called Genesis. It gives no clue. LOL! Genesis of the Zor, Terrans, Glorie, the flowers or the little rat bunnies?
Whether or not the Zor and Terrans become symbiotic with the flowers again is kind of left in the open if you feel the flowers were not destroyed. Perhaps some Terrans and Zor go the way of the flowers and some don't. The ones who don't want to would probably leave Glorie.
I like series that were not too popular. That leaves room for lots of viewer translations. Bad ratings equal no bad sequals.