Auto attack potency is calculated based on the delay of your weapon.
At a delay of 3.0 seconds your auto attack would have exactly 100 potency.
As most paladin weapons have a delay of 2.08 to 2.24 they where at ~70 potency.
This is just a guess but the "Weapon delay will now affect damage output" COULD
mean that sword oath will now deal 75p / 3.00 * weapon delay.

If this was to be the case, it means that there will hardly be any difference
noticeable. Which would quite upset me, as I a had read somewhere, that they
are finally thinking about bringing PLD and DRK to comparable DPS levels with WAR.