I don't feel like NA teams theory craft at all
From my admittedly casual perspective, it seems like every NA team just analyze what Korea or China do, instead of trying to craft a unique playstyle and champion pool for themselves.
I get there are always some stronger picks but are they really that much stronger in competitive? Like are they even more than 5% stronger?
In competitive you have the huge advantage that you have 4 teammates that are all good players that can follow a specific plan and playstyle. There are no doubt tons of undiscovered "op" comps that can be difficult for other teams to adapt to if they're not used to playing against it.
I bring this up because I've never seen a unique comp come out of NA. It's like NA teams just accept that they're bad and relegate to being a cheap imitation of the "way better" teams in the east. There's not even an attempt to do something bold and different. It's a let down to be honest.