I'm curious, did you ask or did Courtenay offer any further details or explanation of possible/probable cause for your bricked ECU?
I have never noticed any rev hang mine is a 2023 model, I do frequently use the rev matching I love how much smoother gear changes are !!I was driving recently and noticed that the revs now, since the ECU tune, behave quite differently when changing gear. when changing gear they now drop and take up again vastly quicker - just like a car with a cable controlled throttle - so there is now zero Rev hang. For me this makes no difference at all as to how the car drives but the whole issue of Rev hang has been a major issue for some.
I have a 23 model and that was one of the first thing I noticed was the way the revs hanged. Lesser in N mode but still there. I suppose it’s what you get used to. Previous car was a 2016 Ibiza and revs dropped very quickly on that.I have never noticed any rev hang mine is a 2023 model, I do frequently use the rev matching I love how much smoother gear changes are !!