The new method of producing the screen had a few immediate improvements. TFT made it possible to reduce the crosstalk between individual pixels resulting in a significant improvement in image quality. Crosstalk is when the signal of adjacent pixels affect the operation of the pixel.
Gregorian mode. The introit Quasi modo geniti, from which Quasimodo Sunday gets its name, is in Mode 6. A Gregorian mode (or church mode) is one of the eight systems of pitch organization used in Gregorian chant.
'Splendid' modes are simply the name that ASUS gives to their monitor presets. It is not possible to disable them entirely. If you want the best control over important image adjustment options you should use the 'Standard' Splendid preset.