Changes to mana regen, an unintended Janna nerf?

So the recent changes to mana regen have some weird things going on that riot didn't explain completely. The amount of mana that champions regenerate early is a lot less. This would be fine because it hit everyone almost equally, but it hit janna especially hard. In order to be useful in lane, Janna has to max e and be pretty proficient in shielding , but with the recent changes, she really has trouble since her main ability (shield) costs 110 mana really early into the game. Anyone else see this? Or if i'm missing something and this is an easy fix, I'd love advice on playing janna with these new changes

IGN: Kesew