2 way LSD provides full lock for acceleration and deceleration. on dry, it gives u almost perfect transfer of powers to both wheels. even during corners, both wheels are locked. so... this gives u the less tendency to skid during corners on dry lands...
disadvantage is during rain.... totally can't drive... joewe knows the experience of driving full lock 2 way LSD on the track during rain.... he was behind me, took the corner same speed.. which is medium speed... i got through the corner.. but he skidded..... he has old tyres.. might be another reason.. but generally, 2 way LSD is very easy to skid on wet and also on dry if the car is powerful....
i'm pretty dizzy now.. i might be wrong... let's wait for another oppinion.