Active Slow Immunity Item (Melee only)
I have a feeling the game would change in a much more positive direction if one were introduced. Specifically, if it were designed to give them an easier time closing the gap, rather than permanently sticking to their target.
The game is so over-inflated with slows now, and crowd control in general, that many melee champs are pretty lacking. You have to admit that slows sometimes feel like they're just tacked onto an ability for no reason. Some champions can even essentially invalidate others due to the spammability of safe, ranged slows. Some melee have absolutely no way to answer slows, and often times get killed due to it, and it takes little to no effort from who ever is spamming them.
Yes, the item would push some melee over the edge and make them over-bearing, but at the same time, it would mitigate an abused weakness of melee atm if it becomes must-buy, which would in turn create another lever that may be adjusted, while that crippling weakness is removed and without invalidating the inherent advantage of range. It doesn't directly close the gap for them, but it does allow them a window of opportunity to get around slows, which are generally the most spammable form of CC in the game and completely gate some champions.
Most of the current top melees can get around slows for the most part, so it would not push them too much further ahead, outside of possibly Irelia, since it would likely not make them a bigger ball of stats than their current buys.