Partial Dependence Plots : Subplot Axis Labels

For both one and two way partial dependence plots, the subplots have inconsistent axis labeling. e.g. the x-axis labels are present for all three subplots but the y-axis labels are only present on the top-left subplot.

This should be fixed to either be:

1. All subplots have both labels.
2. The y-axis labels are present for the left subplots and the x-axis labels are present for the bottom subplots.

I suggest option 2 with a bit of experimentation to tighten up the white space in between the subplots.