I disagree (obviously or I wouldn't have mentioned him in the first place. I am a drummer and a fan of very technical drummers (the likes of Virgil Donati, Dave Weckl, Vinnie Colauita, Flo Mournier spring to mind) but Erlandsson's brilliance is that he matches the song excellently.
On The Red in the Sky is Ours and With Fear I kiss the burning Darkness he was a lot more flashy but when ATG stripped down their style, Adrian followed suit. Terminal Spirit Disease is a good example of playing for the song. Strong drum parts which make you want to headbang.
Would blasting and polyrhythmic fills have fitted? Good as they may be - you can't headbang to Cephalic Carnage.