New blackout mechanic on Duskblade will be crap in high elo.
New duskblade has the same problem as old stealth vs Pinks wards => see you lane opponent finished duskblade? drop a trinket ward to proc the passive, and watch your opponent cry, cause his item does jack shit to help his roams. passive even has the same timer as trinket, so if you want you can permanently disable this for your opponent.
IMO this passive can only be used on jungle assassins in current state. at least at high tiers of play.