We have all looked at different projetc and considered them over-engineered.
Some might be due to lack of knowledge (paradigmshift, etc), others down to just not thinking.
A lof of Sviet equipment might be said ot be over-engineered, but was probably designed to be handled by somewht more rought personnel (if you can fix it with a hammer, use a bigger hammer).
An example:
1) Looking at Do-17, the flying pencil: who came up with the idea of giving it mud-guards for the main gear? Looks silly, really
2) Others?
Just for fun for NY.
Ivan