@wintergt:
Blocking attacks or shattering a logia doesn't really help the WB side though. Besides the skirmishing, Akainu destroyed a ship and not too much more happened. It's actually in this chapter that whitebeard made the most progress - even though Oars went down, he cleared the path and all the new world captains are now getting in position to help attack the plaza where Ace is.
Yes, but it is obvious, that not one admiral has attacked oars. The fact, that he could crash through the navy blockade, take some giants down and make it right to the plaza, is only because the admirals are occupied with the wb commanders. If the shichibukai hadnt act, oars could maybe reach ace. This could be the reason, why wb dont want oars to attack right yet. His other commanders should pull the attention of the shichis on himselfs. For example, this gun arm guy didnt have a chance against hancock, but due to her fight against fodder, she couldnt attack oars. So the stalemates from aokiji-wb, marco-kizaru etc. count for whitebeard.