Riot took one step forward and 10 steps backwards with the teleport nerf
Considering ignite made heal a useless summoner spell and takes away 25% of your health if you're a squishy (410 true damage).
Snowball oriented meta and towers are useless where one back means losing your tower.
So the only useful secondary you gave botlane was teleport. At this point, if you don't take ignite botlane - you're useless.
I mean, it always had a long cooldown and this benefit.
You made a snowball oriented meta and the one of the few viable options to reduce it get nerfed.
unexpectedly, but I think they were the right direction in the long run).