Well right now in 1.8 Axes, you need atleast 7 minimal critical attacks to kill a full protection4 set,
But with blocking using the diamond sword could need 8.5 approx critical attacks in order to kill...since almost 90% of people don't use the sword as their shield the 1.9 will arithmetically remove the enchanted golden apple since it is just a hella op with the resistance and replace it with the shield..in my opinion it is just no big differences at all..