First off, if there is a God in heaven, we'll see the LCS program cancelled before any more of our tax money is flushed down that black hole. Think of the LCS as the Navy's answer to the whole F-35 program. It's a waste of money, time and resources.
There's a reason that it's known in the fleet as the "Little Crappy Ship". It's had numerous difficulties with it's insurvs and to date, despite all the hoopla and fanfare from the big bugs who are invested big time into it, the LCS has no dedicated modules, and can't deploy anywhere without significant mechanical and corrosion problems.
It's supposed to be this great littoral warfighter, but it'll be shot to heck by anything from a .50 on up. It's great speed is touted, but it will burn through it's available fuel in 24 hours.
But back to the modules. There is no available crew space for those who will come aboard to operate whatever module is fitted. That means ersatz bunking. Also those people will be designated solely for the module, so will not be available and/or trained in any LCS damage control or casualty systems. As it is, LCS depends far too much on technology to run things, so it can reduce the actual number of billets required. But technology can't plug holes, turn valves, fight fires, dog hatches or remove a casualty from some space.
As to those modules, where are they? Where will they be assigned? At what base will they be homeported, their crew stationed awaiting their use? How will they be mated to the LCS? Will they be taken to the ship, or the ship pulled out of theater while the module(s) are swapped out? Heck of a thing in combat to have to pull a ship out of service so as to pull one module and fit another, plus get all the new crew there, aboard, etc.
It was another case of some big bug getting smacked by the good idea fairy, and convincing others to go with it. If it's the future of the US Navy, then that future is looking pretty darned grim.
And don't get me started on DDG-1000, the Frankenship in search of a purpose.