This is because there are half the number of F2L 'cases' as in CFOP (20 compared to 41) and the centers are fixed. This means that ZZF2L with EOCross is mostly regripless due to no rotations and only quarter turns. It is definitely more ergonomic, as you eliminate the blind spots at DR and DL and you eliminate half turns and most other moves which cause regrips, while reducing F2L to mostly quarter turns. Fairly self-explanatory, instead of solving EOLine, you solve EO with a Cross.
