Impressions from the grass event

In short, if your local biome didn't support grass type pokemon, you most likely didn't notice anything but the six hour lures.

This means a repeat of the water festival where only areas that already had a healthy number of water pokemon got substantially more of those.

Sure, there was a marginal increase in grass type pokemon in the city, but the invasion hit remote areas where they could be found before.

All in all it means the event was basically a dud. If you weren't all that interested, because you already had what you needed, then you got swamped by grass type pokemon, and if you really looked forward to the event due to personal lack of them, then you were out of luck.

I can only hope Niantic eventually learns that they should cater to the biomes lacking a specific type of pokemon during these kind of events, or they'll just upset their users.