[Galaxy Note Pro 12.2 Android Development] shardsx:
I've put in three other fixes that are pretty specific edge cases, so it's not something that everyone should use:

1.) For the tablet's display, I want to have greater text density like on a computer, so I set the Display Size setting to "Smaller" to shrink down and condense the display elements. The knock-on effect of this is that when you're using the pen or mouse, the circular pointer cursor doesn't scale. It does initially scale when you make the change from Normal to Smaller, but upon reboot the cursor will be offset by a few pixels. Since there's no way that I have found to disable the cursor on pen hover, it creates a distracting visual element during writing on the screen. The first fix I put in is to re-scale the cursor image so that it's pixel accurate, but the downside of this approach is that the cursor is now accurate only for the Display Setting set to "Smaller". Setting it back to Normal or any other scale, and then rebooting will offset the cursor again.

2.) I find that the default circular pointer cursor with the blue ring will easily camouflage. Having visually lost the cursor so many times, I got fed up with it and just changed it to black and white and made the lines slightly thicker so that it stood out more.

3.) I like to do some gaming with my tablet. Having Sony DualShock4 controllers, it's easy to pair with Android 10, but the issue with Sony and the Android Bluetooth stack is that after about 30 seconds of connecting and/or idling the controller, any subsequent input from the controller comes with a huge amount of input lag. This has been a problem for Sony controller users for years and the internet is full of exotic fixes that have never worked for me, other than to install an application called Six Axis Controller (which has been removed from the Google Play Store after the author abandoned the project). That app had the side effect of making it impossible to connect any other Bluetooth devices while the DualShock4 was in use, and drained batteries super fast for both the tablet as well as the controller. Then, I found another forum post that indicated the fix was to change a certain parameter from the Bluetooth driver code before compiling it, so I followed that, compiled it into the SM-P905 rom, and now everything works perfect. No extensive battery drain for the tablet and controller, and I can use other bluetooth mice/keyboard/headphones while the controller is connected.

Like I said, very specific use cases, but willing to share all fixes if any scenarios apply to you.

I would offer to help compile a SM-P900 rom for you, except the disk space constraints I have. I had no idea it took this much space to store the source code and all the compilation files, so a huge shoutout goes to @Valera1978 for all the different versions of code he must have sitting in his computer. The fact that it takes me about 8 hours and more just to download the Lineage code the first few times I've stumbled, wrecked the code, and had to restart all over is making me put the brakes on clearing my SM-P905 work. I do wish to help contribute back to the community though, so I'll try to provide any guidance I can with my limited understanding and capability.