I can get a lot of motion and poses out of my Ghidorah's neck. You just need to not be afraid to have the joints pop out in the process while doing it.
However, what is shown in their promos and on the box is not always possible no matter how hard you try.
Prime example is this pose with RyuuRanger:

That is from the promo shot, but in reality, the only reason this looks like it:
is because it is from the far side. The Arms can NOT move any where near as close together as the promo shot makes it look like it can.
Here is another one I kind of hid how it actually looks with the fire effectL