Remember when we had a mastery tree that allowed us to make decisions?
The tree we had before keystones existed not only provided way more options and enhancements to your champion, but in my opinion came off as a HELL of a lot more creative which in turn allowed you to be more creative. I used to have so much fun mixing and matching runes and masteries for my favorite champions and seeing what really fit my playstyle, I remember picking 17/0/13 on my top lane Shen back in the day and thinking it was the coolest thing ever getting healed extra from my Q (RIP Vorpal Blade).
It's way more cookie cutter than it ever has been and regardless of this season's additions, it has just as many non-decisions as the new tree always has (Looking at you, Courage. And Perserverance. And Veteran's Scars. Well, basically all of Resolve). I know this game will never be immune to change and I'll always keep up with it's current state, but for me it was during the keystone release that my personal enjoyment dropped off to a pretty extreme degree.
could build AD but LOSE MR and Armor, making him have to play more carefully.