Huh, there are a few 2-offs, but no optimizations. The structure could be interesting, but there aren't as many routing possibilities as you would expect.
Good practice for lock structures and fun to run through; bonus points for the fact that each row is a rearrangement of the same 2- and 3-block structures.
Why follow directions when you can just pipe?
It's a good teaching level for these kinds of optimizations.
Note that there are also ordering variations, displacement pipelining style.
Insights