As far as I am concerned an LCS is a good concept. The key of course is not to make it a “do everything” vessel. It needs to be tailored to a specific role and used there almost exclusively.
In some ways the way the current navy views an LCS is much like the Navy of WWII viewed the battle cruiser. A battle cruiser carried Battleship guns but not the armor of a battleship. So what did the Admiral’s do? They tried to use it as a Battleship. And they got sunk because of that wrong usage of their capabilities.
The Battle cruiser was the ideal ship at the time for use in Merchant Marine raiding. Setting one free on the Japanese merchant fleet would have diverted combat ships from all over the pacific to hunt them down.
That in turn would have made the actual combat missions the Japanese needed those vessels for in dire straits indeed.
It’s all a matter of using your resources carefully and in most cases for the missions they were built for vs. those they weren’t really qualified for.
You really should read more about the Little Crappy Ship. Check out how many deployments they’ve made and how long the first two have been around. This ‘ship’, if we can call it that, would be a net negative for any Battle Group.