The littoral combat ship (LCS) is a class of relatively small surface vessels intended for operations in the littoral zone (close to shore) by the United States Navy. It was "envisioned to be a networked, agile, stealthy surface combatant capable of defeating anti-access and asymmetric threats in the littorals.
I was on a frigate designed in the 1960s and I don't see any advantage that this new ship has over that for coastal missions, unless it has a much more shallow draft, and it doesn't look like it. Probably, this is a gigantic waste of money.
Actually, the draft of the LCS is deeper than the old US Frigates. 13ft to the older 9ft. If you were stationed aboard a frigate, you probably thought they were pretty quick. The LCS has a top speed of about 50 knots. The frigate maxed at around 29 knots. I could go point by point of why the LCS is far superior to your 50+ year old 60's frigate, but if you think the draft of the ship is the most important for coastal missions, you won't get it.
The Littoral hanger holds two Seahawks. The 57mm deck gun is all you see, but definitely not all there is. To reduce its radar signature you won't see the Aegis Combat System, rolling airframe missiles or multiple mortar systems. Not to mention the battery of 50 cal's. It can also launch attack boats and even submersibles.
It's capable of bringing hurt to an area much faster and striking from further distances.