I always adjust requested torque on the low end (around town) on cars that have CAIs. Otherwise they feel anemic during clutch engagement from a stop and up to 14% ish throttle.
For stage 2 on any subaru I can think of, an intake is not required, just an uprated panel filter in the stock box. Intakes are mostly noise makers, unless the car is properly tuned for it. Bovs are just noise makers,and actually create more stock turbo boost lag, and a rich condition on shifts under load. The only reason for a bov is when you have a big turbo with rediculous volume you need to move on throttle lift, and that volume exceeds the stock recirc valve capabilities. That scenario is probably 1-2% of modified scoobs. What you really want is a high performance recirc valve, instead of a bov, if you're looking to replace the stock unit. Even many big turbo subarus use a recirc valve instead of a bov.