From my many years of reef keeping leathers react to salinity more than other corals.
i dont see many yellow leathers around. but i see many umbrella leathers so i would class them as not easy to keep.
Yellow leathers do like high/medium light,
My current yellow leather has hardly grown over the last year as it is in low light, however my last yellow leather had to be sold as it grew to big. this leather was receiving very high light.