[Stephen_Zuckerman]

You're wrong about that, Jan.

"Weapon of Choice" is the feat granted to WM at 1st level of the class. It provides no tangible benefit except acting as a prerequisite for other Weaponmaster class features. It represents the WM dedicating him or herself to mastry of the weapon.

One of Overwhelming Critical's prerequisites is Improved Critical. It is listed as "Improved Critical (Chosen Weapon)." This could also read as "Improved Critical (Any Melee Weapon)." (I'm not sure if it works with ranged weapons.)

A Weaponmaster's two greatest class features are Superior Weapon Focus and Ki Critical. In NWN, there's not much else worth having out of the class.

Overwhelming Critical has NEVER required a character to have levels in Weaponmaster.