The thing is, actually you can pretty much do stern tanking against ball ammo against average players.
No more armor on stern, no major impact, you don't sink from it, no survival mode needed.
No more armor on one flank, you just sink and can do nothing about it even on survival mode.
Two or three days ago I was in a small battle, I was the last guy alive in my team against four enemies. All I had to do was to offer my stern to their fire and fire at their flanks to sink them all. Maybe they were not very good, and a pro player would have destroyed me and my crew. And sure it would have been another story if they were firing grape at my stern.
It took me a lot of time to get their flank armor to zero on all of them, but their ball fire on my stern, never did anything, while getting them at zero on their flank, was an automatically sinking of a ship.
Two days ago, i'm in a duel against some british captain, same level, same ship, same story... All I had to do was to offer him my stern to his ball shots and broadsides, stay out of grape range and fire at his flanks. Same results, as soon as he had no more armor on one of his flank, I just had to disengage and wait for him to sink. While I tanked his broadsides and volleys with my stern being at zero armor...
I have countless other examples against average players.
And it's not uncommon either for people in PB to tank towers with their bow, because bow being at zero armor is a problem you ll have to manage at some point but a flank at zero armor is a sure death, no matter what you do about it.
I guess it could be exploited even in PvE, because you just simply cannot sink if you only get hit on your stern.
So I understand rake is powerful with grape but with ball ammo, in the current build, it is not.Some of you experienced players can destroy a crew by firing ball shots through the stern, but most players do not. Bow/stern should be the weakness of the ships, not their best side for tanking ball shots forever just because you can't sink from a stern being at zero armor, no matter how many shots you land on it. And I guess that's why devs want to change that situation.
Now let's hope the patch improve ball ammo rake damage and not the grape rake damage.