>>23494813
They eventually gave him some Zetas. Before then, the Dijeh was good for its time. He canonically stuck with the Dijeh into the Rick Dijeh until the Rick Dijeh was too damaged and he had to use a Jeda. The Dijeh is better than the MKII.

>>23360544
If Rick Dijehs can be frankensteined like pic, then repairing old Dijehs would be easier by slapping an RF Zaku arm. There's also the issue of creating new ones for any reason (i.e. disguising yourself as Gryps Era remnants but actually have better gear than CCA)