For me, they are more like algorithms. Because I am relying onto those that was defined, particularly for hard cases. The easy ones are just like, in CFOP, doing xcross; rather than doing L to bring down the final cross edge then doing L' U L, just do U L, which is defined but not necessarily included in the cases. In ZZ, the assumption of cross edge, which can be FL, BL or DL, is just being color neutral while doing Fridrich F2L that are no-orientation-change algos. Then biasing again with the base color. Being color neutral for a while, I think, is not intuitive. Intuition is more like choices among various alternatives, like in Petrus; there are so many ways to do a quick block in any color that no specific algo. is required. In ZBLL, you are to memorize more than a hundred cases yet considered as algos. In ZZF2L, if you enumerate cases excluding the sense of color neutrality, I guess, is less than that of ZBLL.