For touch and drag focus I'm using the whole right side, relative. I tried absolute, and though it was faster, I found it harder to be as accurate, as when I released my finger from the screen, the point still moved slightly or so.
Otherwise, still waiting for the adapter with control ring. When I get it, I'll likely use it for ISO or exposure compensation, not sure yet. I shoot manual 95% of time, and shutter speed is on front dial, and aperture on back / thump dial. Multi function bar I find somewhat frustrating, but I set the 2-second lock function on it and assigned the left button the live histogram. No other functions there yet. AF ON button I'm using for exposure compensation (hold it down and scroll the front dial). If I end up using back-button focusing, I'll move that exposure compensation to the '*' button next to it.
On the arrow buttons around the 'Q', I set UP arrow to switch between single / continous focus, DOWN arrow to put camera to sleep, and LEFT / RIGHT I use for eye detection on / off and the other for something I don't remember right now...
So quite a bit configuration, but still feeling how it can be optimized even more. Waiting for the control ring adapter... Currently my biggest question is how to optimize changing between autofocus modes/methods. Right now I use the top Mfn-button to open the "dialogue", and use top dial to change the value. This requires that I make sure I always leave the "dialogue" to the state where it points to the auto focus options (using the back dial), and sometimes I forget to do that and it messes up my quick configuration changes...