If you do your research, the Eku was fought in a style similar to a staff and a polearm, with more emphasis on it's ability to knock people around.
Making a new weapon isn't about the obvious, it's about the style, and the character that goes along with it. Sigfried's greatsword is nothing like how people who use a greatsword actually fight, so going on the presumption that you can take a look at a weapon and determine instantly a character and a method it's being used is kind of a folly. Also, the weapon was used legendarily when the Japanese conquered Okinawa and forbade the people from owning weapons, so they adapted everyday weapons into their martial arts styles.
So, allow ME to generalize for a moment to show you what your criticism sounds like:
A three sections staff is cool, but I mean really its just 3 sticks held together by small bits of chain in between, wouldn't that just make it like an extra long Maxi weapon? I mean they could just use it as super nunchaku skin really.
Shaolin monks and weapons are so terribly, terribly overdone. If the game is gonna be blatantly asian-centric, at the very least they could make it interesting in some way.