i get what youre saying man but doing a switch grind up a handrail is not based in reality. sw back board down a rail is super fucking hard even.
i dont think there is any easier switch trick besides switch fs 180, than switch back board. it is definintely the easiest switch grind, maybe swithc noseslide could be easier, but not on a handrail.
a switch 5050 is harder than a switch board even and that has been done down giant hubbas back in the early 2000s even (carlos ruiz blind what if) also switch back lipped massive stuff. pretty sure switch back lip has been done down hollywood high.