ADC builds 
and u practically cant burst down the carry at all, all while being able to dish out tons of damage.
the item needs to be nerfed because it gives 50 AD and 55 MR and 10 flat pen INCLUDING a 300~400 shield to AP damage and 10% lifesteal and spellvamp when the shield is active.
The fact that it exponentially scales with its own MR is disgusting. They can definitely remove that part because when coupled with base MR, it takes a minimum of 630 magic damage to break the shield. It's not uncommon for somebody to buy Banshee's with it, too, so you're blocking a lot of magic damage on both ends of their burst.
I'll support nerfing Maw when it's no longer necessary to get it on an ADC so you don't get 100-0'd with no counterplay when against, say, Annie.
