You've gotta be running comfort mode or be used to racecars if you think it has a lot of body roll. My M3 on sport EDC had less body roll than my Cayman S and many many other sports cars. Now, on coilovers, it has even less. With KW clubsports as my only handling mod (stock sways etc.) my car now has less body roll than my old E36 racecar did, which ran 1000# springs and weighed 2500.
In sum, the M3 has incredibly low body roll.