There is a really easy trick to centerig Emerson knives. Simply loosen all of the body screws, crank the pivot all the way down, then wedge a folded piece of paper between the blade and the scale it is off center towards (pushing the blade all the way to the scale side opposite the direction it is off center towards), then while the wedge is still holding the blade over to that side, tighten all of the body screws all the way down, remove the wedge, and then loosen the pivot to your preferred tightness.
As for the pivot being too tight out of the box, that is to avoid customs issues with knives shipped to Australia and other countries with a history of confiscating Emersons.