Thread:Willbachbakal/@comment-1920550-20160422050145/@comment-1330314-20160526200824

I think it's already been going on for some time (e.g. crit's always been an ADC stat and AP's always been a stat mostly for mages), it's just that Riot's now made it a fully-fledged part of their design philosophy and have taken greater steps to streamline itemization. I agree that certain stats just naturally make more sense on some classes, and conversely that certain classes benefit from having easily identifiable core stats, and I think that's a natural feature of any kind of game where you have multiple character classes and themed customizable statistics. I also think Riot's being smart with their stance in that they're acknowledging that many stats are core to multiple classes or subclasses (e.g. crit on both marksmen and light fighters), and that there are always exceptions who need to be acknowledged, like, even if the latter's going to suffer from the upcoming change.

Where I disagree mostly comes down how my own ideas on itemization clash with Riot's: I believe there should be no itemization for mana, mana regeneration or resistance penetration, for various reasons, but as you pointed out mana's now been bound to mage items, mana regen to support items, and flat armor penetration to some AD burst items (it's not really stat binding, but I have a hunch assassins are going to bound to flat penetration). Taking those stats out of itemization right now would leave some classes with much shallower pools of stats and effects to go for, so there'd need to be deeper changes made to itemization in that respect for classes to all have satisfying things to do with stats.