The mana changes on PBE are fine, but they shouldn't be applied to just the mages.

I'm all for the game being more difficult, and making mana gating more significant is a good way to do that, since it adds depth (Alright I lost that trade HP wise, but he burned half his mana!).

That said, I don't see why the casters are the only ones affected. Come late game, it doesn't make sense that a Lux would have less mana than a Jinx.

Extend the mana pool changes to the rest of the roster. The non-mages who already feel considerable strain on their mana (Sivir and company) could go unchanged, but any mana user who currently doesn't feel any real limit to their mid-lategame mana use should have their stats tweaked.