The thing about turbo timers is true. In my c33, if I got for a hard run, all I do is drive sedately sort of like a warm down and then turn the engine immediately off. Obviously if you've been driving on the highway for 4 hours at 140km/h you don't want to turn the car off immediately, thats when you give it say 30 seconds to just warm down.
As for pod filters, IMO they do make a difference even on n/a cars in throttle response, plus the intake noise is better - cars are just as much about enjoyment as they are figures.