I have been able to disable the shake cursor to enlarge setting by going to
Settings > Accessibility > Display > Shake mouse pointer to locate and disabling the option. The only issue is when I try and use the trackpad on Better Touch Tool Remote (iOS), the cursor is large all the time I am using the BTTR Trackpad!
Is there a way how I can fix this problem? I can only disable the big cursor when using the MBP trackpad not the BTTR one.
I am using El Capitan Public Beta build 15A262e