I think what Teeth is noticing really is that they are easier to use than his standard stabbing weapon, the Long Spear. Which might be true but doesn't make them OP. Long Spear still has its own advantages and not everything has to be as difficult to use as that.
If you think 2D poles are OP then try hoplite, 1 hand stabbing, 2 hand, xbows etc. They can't really do much without making 2D poles obsolete again, they have to have something going for them to justify only being 2 directions or not having a shield.