The pitches in 2012 were not the modern day raging turners, they were more balanced pitches and had a few flat turners. That is why there were many scores of 300 and few above 400 from both teams in that series.In 2012, Swann and Panesar took a combined 37 wickets at about 26. For India, Ashwin took 14 wickets at 52.
Unfortunately, Ashwin is rarely as rubbish these days.
Swann and Panesar would've been lethal on modern day indian pitches