It may take me years to figure out this new car(first GM ever and new American car and first new car I've bought in over 10 years)...and I'm old and slow now...lol
Our Audi was a maintenance nightmare though my shop did great work and I can't complain about any of the upgrades. I pretty much researched and specked everything I wanted done to it...same with my little beast - the GTI,,,that I still own. I too think the bigger turbo has been better for the car - less strain for most driving...of course I get on it quite a bit,
I bet the WRX is great fun...nice to improve its top end....seems thats where they were lacking stock The big turbo in my GTI has a huge torque punch down low but really gets going up top.Its not a huge BT but larger than stock and bigger than a KO4...so turbo lag is slight which I prefer.
The CT4v BW has almost unnoticeable turbo lag....its there but not so much - very linear...just feels like a V8 pretty much. In some ways I wish they would have gone small block V8 with this car....but the turbo V6 actually has more ultimate (easier) potential.
CT5V has same tunable engine as the 4 BW...its capable of much more power and you already get that. Like you I am in no hurry (though I want want want)...but I'll be patient.
You couldn't begin to imagine all the things I have done work wise. Though a civilian I was pretty much always at war or in a state of it. It was real. Not like what your doing though...I was never going to be shot at...and if I ever took a shot...per se...well...no one would want that. Mostly what I did was assessment and certification....of 4 stars and their battlestaffs...through role playing wargamming that I developed with my team.