arg_max
When you get the item you will still have the same type of waveclear as before. It just falls off massively after that. But for a few levels, you will still be able to push waves and roam. Probably troll on LB who really can't use the stat but on Rageblade champs it might still be decent to give you some time to roam/scale. Also, I think they didn't even remove the dash interaction since this would probably require too much actual coding instead of number tweaks.
Yeah first item Shiv is entirely unchanged since all adaptive force converts to AD and many of them just start Long Sword.
The item is like 2-3% win rate over replacement and I don't believe one-shotting casters is doing all of that heavy lifting. So then it comes down to how much of the PVP damage is coming from the ratio. The answer is: Some. The base damage is still quite high.
It could just be deadge, though. We'll see.