I Believe the Immediate Effects of the Support Item Buffs will be a Janna Nerf

So, I'm too lazy to link to these buffs on the PBE, so go look them up yourself on surrender @20 or Reign of Gaming.

Basically, Coin, Medallion and Talisman give more gold, Medallion gives more mana regen, Talisman has a shorter cooldown, and Ardent Censer now gives 10% less attack speed but 30 magic damage on-hit.

Cool. This is clearly a much needed buff to Soraka and Sona, and with the Lulu mana regen buffs in the same PBE patch, and a Leona nerf, we can expect to see some new diversity in bot lane. Good.

Here's the problem. Janna already has a ridiculously high win rate because of her amazing passive, insane no-counter disengage ult, and the fact that she's so uncatchable you can actually build Mejai's on her and expect to keep a reasonable number of stacks throughout the game.

Janna's Eye of the Storm gives her carry a massive AD boost based on how much AP she has. Ardent Censer already gives AP, CDR, Mana and Move speed, all of which Janna loves, but now it gives 30 magic damage on hit, which is going to mean that Janna will be the number one provider of mixed damage to her carry. Sure, Sona and Soraka can both apply the buff in an area of effect (and Karma as well, I guess), but Janna can too, and she can also throw on a BFS worth of AD to her carry. Giving her carry 15% AS, 50-70 AD, and 30 magic damage on hit (as well as a shield) with a single click of the button is just going to be too strong. Janna is going to get some hard nerfs after this item gets rebalanced.