A couple of months ago I ask for a way to quick toggle individual brush property on/off
With help of some forum regular I manage to create something similar albeit in a not efficient approach. 
It’s originally for just personal use, if anyone want to try - the plugin can be download here.
I can’t promise anything, it works for me…
Install
Go to Tools->Scripts->Import Python Plugin from File
Usage
Select a brush,
Click on a button to toggle pressure on and off.
Demo
NOTE
- There are some issue, one is it occasionally toggle the eraser mode if it happens that the previous state toggled it on/off.
- It also works by traversing QObjects till it get to BrushEditor then checking/unchecking checkboxes there. So not very efficient and somewhat hackish…
- If you check/uncheck the brush property pressure of from BrushEditor it will not be reflected back to the docker until you switch brush.
you can check @TheTwo who is proposing for a tool that cover some of the function of this one similar
Can’t wait to try it out, this will be super handy! 