I think JQL has one element your design lacks -- exhaust management. But yes, it's in the same vein, especially that patrol-boat installation And that version hits at the reason why someone would do JQL instead of something like the ExLS 3-cell launcher -- JQM is a lot shorter. Especially useful if you're trying to bolt it on the upper deck of a vessel like the Mk VI of on the back of a flatbed truck like the JLTV. I think the below-deck version isn't really much better than ExLS except maybe saving some deck penetration if that's critical (as it might be in LCS/MMSC).
PS: the main page for all of these launchers is
here. It's worth looking at all of the new ones -- ExLS 3-cell, Host ExLS, and the Single-Cell Launcher (SCL). They each offer slightly different capability permutations for different applications. Hard to image that there's room for all of them in the market, though. The large clusters of SCL especially confuse me. By the time you build a 2x4 nest of SCL, are you really gaining anything over Self-Defense Length Mk 41? (But then again, they don't seem to be offering Self-Defense Length Mk 41 anymore, so maybe they think SCL is a better alternative.)