This is a very good post, I would prefer one piece strikers, due to their construction, two piece strikers may have some gluing issue down the road, ask Primos....but other then that, two piece strikers are as good in some cases better then one piece strikers, balance, now this is an issue all it's own. The most important factor of any striker is balance, the amount of friction carried up the stick to produce the reverb, determines the amount of volume it can carry, and balance is the key to a great working stick. I agree with Mad.....except I would probably go this way ... balance, densisty of wood, weight....and again it is up to the individual who is using the striker, their point of contact on the surface and the positioning on the stick plays a huge difference in the stick's ability to produce.
All in all, go get you a handfull of good balanced sticks, one and two piece, play them and make the choice from hands on experience. pappy