I think that meta-ethics [1] is practically problematic for those who are interested in improving themselves and others without digging deep into theoretical stuff, without trying to understand the nature of normative and applied ethics.
Meta-ethics may look intellectually problematic when considering moral relativism [ibid.] and learning that normative ethics cannot have universal definitions of good and bad. That is, not clear why should we worry about ethics at all if definitions are depending on somebody’s will.