Torque converter unlock

[daviesbike]

i was just wandering how exactly the torque converter works and why it seems to feel like it drags the clutch untill around 2.5k rpm is this all in aid of getting a smooth ride and gear change ?
and also the fact that tip is not quite as controllable as id like, ie when doing 30-40mph i would like to stick it in 5th if i want to with out it being over ridden.

am i alone in this or do others share my views ?