The LCP is a "close quarter combat" pistol by design anyways. Underpowered? I think not! I will have emptied my six shot magazine, before the bad guy hits the ground. If at that point, he/she is not seconds from death, then I guess I'll retreat to reload? Either way, the attacker is not going to be in any shape at this point, to put up much more of a fight. IMO.
+1 Coroner.
My Kel-Tec P3AT (like the LCP), was NEVER designed for IDPA matches, it's the up close "little" pistol to defend one's self. .380 bullet technology has improved drastically.
Accurate hits with a Cor-Bon, or Speer or another name brand round will change the entire critical dynamic, (thanks Rob P.).