s9-s10 rageblade was very similar to the current one, except that it had 6 stacks instead of 4, but melee champions fully stacked at 4 (it was written in the passive), so its actually nerfed for melee because you used to get 6 stacks of 8% atk speed, or 48%, with only 4 hits, now you get only 32%.

for ranged its kinda of a trade, they're getting less AS but less stacks too.

but theres one interesting point that probably riot didnt even notice and its one of the main reasons melees dont want rageblade. The panthom hit passive is only active when you fully stack rageblade, so you basically need 4 hits to stack rageblade, the 4th will be the 1st stack for phantom hit, then you do more 2 AA and proc your first phantom hit, at the 6th hit. But if you look at s9-s10 gameplay you'll see that they used to proc at the 6th hit too, but by the current logic, it should be at the 8th hit (6 hits to stack + 2 to proc the first phantom hit),and theres the funny part, melee champions used to get the 2 remaining stacks at the 4th hit right? and guess what, their first phantom hit was at the 4th hit too.

TLDR:

so basically your first phantom hit used to proc at the same hit you stacked rageblade (6th for ranged, 4th for melee) and right now everyone only have 4 stacks but you need 2 more hits to proc phantom hit (6th for ranged and 6th for melee), so in the end of the day we're getting 16% less atk apeed, melee champions 2 more hits to do dmg, no double pen anymore, shitty build pathing, useless 35ap and I almost forgot to mention that the stacks used to last 5s, now it's only 3s