I have a multi-figure Bokeh plot of vertically stacked & aligned figures. Because I want to align the plots vertically, the y-axis labels are rotated to be vertical rather
You can control the number of ticks now with desired_num_ticks property. Look at the example from the bokeh docs (and this issue).
desired_num_ticks
For example, in your case, something like this: plot.yaxis[0].ticker.desired_num_ticks = 10.
plot.yaxis[0].ticker.desired_num_ticks = 10