1) Plotting strain is the best way to see the local deformation in the material. Don't focus on the displacement because that just increases linearly from the point that didn't move, so the magnitude is not that useful.

2) You are stuck with radians for that field. Other places in ANSYS you can use degrees.  I don't know much about Mohr-Coulomb material model so I can't comment on the magnitude of that parameter.

Good Luck and Cheers,