Since having my Vestax decks with the pitchbend joystick Ive started doing this on technics and it makes a big difference.......

using the joystick on the vestax, set to 1% pitch bend, you can't hear any tone change when adjusting, and I just got out of touching the platter at all (pluss I think my vestax are wicked with with the stick, but iffy if u touch the platter )....... - sometimes for quickness when I'm queing I'll prod the platter to give it a slow, but other than that.......

Not sure about pissing with the pitch live when two tune's are in mix...... I've never given that a go.... what is the exact effect ur aiming for - gettin one beat to be prominent either side of the other - back and fore?