Dithering on mDNIe doesn't work because I haven't reverse-engineered the specific controls for that yet. It's also something which you don't want. Please ignore those settings. I have re-worked the whole screen controls in v33 and this version will have comprehensive features. I have a user who calibrated the Note 2 screen with a spectrometer, and the result is better calibration than iPads. But I'm still working on some things so please be patient.
Higher overclocks will come once I implement body bias control. Probably after I finish the screen controls.