I've never been a huge fan of s roaring engine or exhaust note in the cabin. I will agree that the newer cars transfer far more road noise into the cabin than the engine produces.
^This.You could just swap in a different intake and proper tune. It should give you some relatively cheap thrills.
Dynamat and it will kill sound in a big wayI have a 13 STi , as the stock Dunlop tires wear , they get way noisier . Subaru's do tend to have excessive road noise , and through research , I've found it's because of our wide / low profile tires and lack of body sound deadening material . I saw a you-tube video where a guy installed some kind of mat to all the open panels and that seemed to help a lot .
For sure some of this (here's what I used) and definitely some of this -> https://www.amazon.com/gp/product/B0736LXVX2/ref=od_aui_detailpages00?ie=UTF8&psc=1Dynamat and it will kill sound in a big way