If you do have a tablet the morph create tool supports tablet pressure. So if you have a Wacom or similar tablet grab that stylus when you switch to the Morph Creation tool. It's kind of like a minature zBrush right inside poser.

There is also symmetry but it works different than zBrush in that you apply it after painting the morph. I can apply symmetry to the whole figure or just the current body part. The "Mirror" button is at the bottom of the tab.

I find a great use of the Pull/Surface setting is for fixing pokes in clothes. Set the brush to a fairly large size and a very low value. A couple of swipes on the poke through in the clothing and it's problem solved.