I bet Subaru has not changed a single thing besides how their crank is treated and dual avcs/air pump setup.
If they did improve the oem setup there would be way less failures.
I'd be pissed off too if I spent 30-40k on a brand new Subaru wrx/sti
Then it spins a bearing, cracks a ringland or throws a rod...
This is the reason why changing to a gr would not satisfy me, because they have the same if not more motor failures.