Supports got better compensated for mana potion loss.
I was worried about mana issues while play support without pots. But I find the new support item makes it far better for them then other champions. Either a upgraded warding item with 150% mana regen or the active trinket with 150%. Either way you get more mana regen then most ap items. And since most supports by some kind of mana regen item after they go almost resourceless.