So I like the design here, as an owner of the L2 I was wondering what with the decision to drop dual fan support on the top of the case? It seemed to me the best way to maintain decent aiflow throughout the build.
The L3 introduced a very open vented side panel, which allowed for effective (if not better) cooling without the use of the 80 mm fans. Remember, the L2 vented side panel was optional (and not a very open design), whereas with the L3 it was standard. The L2 evolved from the L1, at which time I was trying hard to avoid having a vented side panel.
It's not perfect, but it works well, is smaller, quieter, cheaper, and easier to build.