Good write up.
Having had loads of cars with LSDs, I can vouch for the extra traction. I've found FWD cars tend to be a bit twitchy though when an LSD is fitted and I would say torque steer is probably increased especially with plate type diffs. Gear type diffs such as the Quaife and Torsen and are more progressive and the Ferguson diffs that were used by Ford where very easy to live with.
The three BMWs we've had with LSDs all had a habit of wagging their tails if pushed really hard and with no electronic aids were fun but controllable.
Previously: 2007 335D MSport E90 Le Mans Blue, 2004 330D A Sport Silver Grey, 2002 330D A Sport Saphire Black, 2001 320D SE Touring Titanium Silver, 1998 M3 Evo Techno Violet, 1996 328i Sport Montreal Blue, 1994 325i Coupe Red, 1989 325i Sport 2 door Dolphin Grey,1986 325i SE 4 door Lachs