What would they come up with? Perhaps something like what Russia seems to have sketched out;
The vessel is expect to displace just 1,500 tons with a top speed of 35 knots.1,500 tons with a 5.1" gun, torps, and multi-use VLS?
Based on the various illustration available, it seems like this "Russian LCS" Trimaran could be fitted with:
A-192 130-mm main gun
UKSK VLS cells and/or Redut VLS cells
AK-630M-2 "Duet" CIWS
PK-10 decoy launchers
Mini-Poliment radar(from 20385)
"Zarya-2" Hull Sonar, "Vinietka" VDS
"Puma" 5P-10 artillery radar
Spot for helicopter Ka-27 type in underdeck hangar
Yes, they learned their lessons well. They, like us, may make a dog's breakfast out of a good idea - but let's give them a chance to fail.