For as rough as DiU was, it did have some major gems tucked in and around it.
Pierrot's Coop, with a spectacular participation by Naruhito Sekikawa, is still one of the coolest looking in ALL of JoJo.
A fully Solo-Animated effort by him, with design work, inbetweening and AD
I think its important for people to understand that just because there's sometimes a decent gap between seasons/cours for some series doesnt mean the production is immune to struggling near the end. Internal delays pile up constantly for one reason or another in unexpected ways.