Just because a het of a morph might make a change or "markers" does not mean it is NOT recesive. These markers are also not 100%. You can not breed a het clown to a normal and with 100% accuracy pull out the het offspring. Same is true hor pieds. Most of the morphs are actually recesive IMO.
Here is wiki: a recessive gene is an allele that causes a phenotype (visible or detectable characteristic) that is only seen in a homozygous genotype (an organism that has two copies of the same allele) and never in a heterozygous genotype.
A het clown does NOT look like a clown. A het pied does NOT look like a Pied. A mojave does NOT look like a BEL. and the list goes on.