With your constant switching of items due to professed "balancing", the transition from S2 to S3 has been nothing more than an excuse to crucify champions certain game devs have disliked (I'm guessing a very long time now) to absolutely butchering some of the best items in game, removing them, or breaking them into useless piles of ****.
To begin...
Executioner's Calling
This was my core #1 item in my Draven build, and I now find it is totally worthless. Removing the life steal % from it made it totally unviable for any champion to build it, ever. It had a very small niche in game, which you saw fit to knock its spot off of. It's like someone at your offices is jerking off furiously at the mere mention of players building BT's, and wants to nerf any other option but that overused, OP item.
Tiamat
Melee only now? So, no more having large AoE "shraphnel" blasts from Tristana & Corki?!? Again, there was a very tiny group of us that used Tiamat, even as ****ty as it was before, and now its delegated to a core item for another new OP BS item.
Warmog's
The health stacking on this was actually a bit fun, and it made it to where just because you bought it you weren't instantly the super tank god of SR. It should be changed back to its old stats & effects, so that everyone & their uncle that's not a tank won't be buying it just to happily stroll through ults.
Every removed item
This was you, at your dumbest. Singed, and many other champions relied upon some of these, the best core items in the game, that have been around forever. (With the exception of Moonflair Spellblade, Cloak & Dagger, and Ionic Spark, whom I feel never really found their niche in game.) Instead you add stupid, useless **** like Mikael's Crucible, and the Shard of True Ice. Which in theory, and theme, are good items, but really just fall short of being anything better than an inventory slot waste. I'm not done ranting at you...I'll be back, this post is going into champion feedback, as well.