The WW2 "torpedo boats" aren't same thing at all as the WW1 vintage TBs aren't. This game is about the small (70-110 feet), plywood, internal-combustion driven torpedo boats, not the very small traditional warships that destroyers were built to keep away from the capital ships. The classic TBs were still around in WW2, but really only the Germans and Italians used them.
I'd say there's enough sim value in PT Boats to be worth a major effort. An 80' PT boat is bristling with guns, goes 40+ knots flat out, has torpedoes and has no defenses other than sneakiness, speed or smoke. They fought all over the world and took the fight to the enemy every night. Count yourself lucky Akella didn't decide to copy the engine management from a flight sim and make you spin dials down in the engine room.