Duskblade definitely needs a NERF.
Now before I get downvoted to hell, hear me out. I'm not suggesting that lethality as a whole is OP. I like what they did with the stat... it's just Duskblade itself is incredibly overtuned right now.
I'm all for lethality becoming more viable but when people who shouldn't build it in the first place, is building it and when it's becoming a "rush 1st item", that's when you know the item is too powerful atm.
I mean, where is the counterplay to a 99% slow and bonus damage that doesn't have a cooldown? A
who can proc it 2-4 times in a single fight is simply ridiculous.
Current list of users and abusers:

Those are so far the champs which I've seen rushing Duskblade in my games and as you may see, if it's an item which a LOT of champs can utilise (and keep in mind, there are more which haven't been listed) then there is certainly an issue at hand. It's also the fact that Duskblade is outshining the other lethality items and is singlehandedly bringing back a lethality-abusing champ meta, which was not fun at all.