
Syncbreaker makes a great point here
Using the AC1 version of hidden blade combat mechanics would actually be a fantastic idea to drop in Assassin's Creed going forward.
I know people do make points about the style of hidden blade combat, and they're not wrong, but it never felt quite right to me to use hidden blades in open combat in the same sense as you would, say, a sword.
Personally I would prefer it to be an assassination-only tool, like in Unity onwards, but using it as a finisher also works well too, especially if you can't spam it because the surprise of the hidden blade should be gone after the first couple of times you use it.
I like Syncbreaker's idea that it should be more like AC1, where it's a high risk, high reward instant kill tool, but I'd say it should have the added caveat that you can kill almost anyone with it, but can't use it more than, say, twice in one combat encounter, as all other enemies can be then prepared for it and counter you accordingly. Maybe the damage from that should be particularly harsh in order to make it immediately clear that you don't play the same trick too many times.
I dunno, guys. Unless the blade is specifically designed for combat support like Connor and Naoe's pivot blade or Ezio's hookblade, it shouldn't make sense to use them in open combat. Assassin's Creed Revelations especially drove the point home for me on why that shouldn't be a thing, and while I rarely used the hidden blades in combat before I saw that trailer, the trailer convinced me to never do it again.