Who was Hail of Blades designed for?
A serious question. We get that it's supposed to be for really quick in and out trades for three autos but then you have Lethal Tempo that was designed almost under the same fashion. There is no practical reason for Hail of Blades to exist when its objectively a worse version of Tempo.
Sure, Tempo has a 1.5 start up but it can be proced by any forms of damage and even then, it doesnt have the limitation to just 3 autos. Nor does it have the restriction of needing to be 5 seconds out of combat inorder to be refreshed like Hails does. Not out of combat with champions, out of combat in general. That is a pretty big restriction compared to Tempo's generic 6 second cooldown.
Even with the buffs to Hails in the PBE there is no reason for any champion to take it over Tempo. If anything, the only champion that I can remotely think of that would consider using this would be Jhin depending how it interacts with his passive.
but she's garbage anyways so who cares anymore


with Hail of Blades up you get sick nasty amounts of attack speed.
Because the attack speed just turns into more damage for him and his reload is just enough time for hail of blades to be back up.
And uh... Rageblade users? I mean yeah there are a ton of characters with three hit passives but it seems like a waste of a keystone since electrocute is in the same exact tree.
and maybe
are the champions I could see using it to deal their damage quicky, as they utilize AA with their abilities, but not enough like ADCs do. But even then, there are better options to choose from.
faster... but why bother when you can just take lethal tempo? Then again game is going the path of your fight is decided in 3 atks anyways.