I agree that Anivia needs love, I disagree on brand though. He does so much damage in a teamfight that if he got any actual buffs it would push him over the edge.
Heimerdinger's playstyle is cancer (don't interact with your lane opponent) so unless his turrets get gutted he can't get any real buffs either.
Nunu relies too much on counterjungling, can't change that without a complete rework.
If soraka could grant mana, she'd be useful again.
IMO, here are some changes that I think rito could throw out
: Reduce the damage of her spears by a little, remove the arming time on her traps (or reduce it by 75%, so they're actually usable in combat), allow Hunted to stack up to two times on a target, amplifying Takedown's damage and Pounce's range with each stack, and revert the damage nerf to her traps. The idea here is to make it so that getting hit by that one spear is less punishing, but if you step on a trap AND get hit by a spear, you deserve to get deleted. It would also make Nidalee players actually use her W outside of clearing the jungle.
: Revert to release state.
: Give her a complete rework- her mana costs are too high, her plants die really fast, the arming time on her ult is too long, and her passive is 100% worthless.
: Honestly for the longest time I didn't even know Taric existed
: Reduce the range on his ult to 5500 (down from global), but give him the following changes: Feint grants Shen a spell shield for 1 second. If it blocks an ability, shen can reactivate it to blink behind the enemy that triggered the spell shield, and stun them for 1 second.
Reduce the rate at which bloodwell decays out of combat, increase the healing from his W, give his Q the vi ult treatment, making it uninterruptible (because it has a really long animation, and any CC stops it)