Fiddlestick Passive Indicator

Since the recent changes to Fiddlesticks passive, i was just wondering if maybe he could have some kind of indicator for the units who are being currently effected by it, rather than it just appear as a debuff when you click on the unit. I think it would help with the clarity of the game and make it easier to know which units are actually debuffed, and which units are not, sorta like Nidalees prowl.