I looked to the currency changes and then saw this. I guess if we change our Marks of Honor to 185 Honor, we will get more honor point on 4.0 and cata.
Here's the calculation:
1 x Battleground Mark of honor = 2.976 HP
Converted Mark of honor = 185 Honor and 185* 0.024 = 4.44 HP
So its logical that we convert all marks to honor and wait for the currency change. Am I right?