Subs not fighting Subs....
Most sub players I know like SS vs SS combat.
https://www.youtube.com/watch?v=kiwpm7JrxrQ
https://www.youtube.com/watch?v=evFwAWpfXWg
Sure some people dont like to play sub vs sub but to call that Abing is not right when all they do is go north when there is a enemy sub south at the start at the battle.
Xp isnt the isue here because it doesnt matter much what you sink as long as you win the game.
More then 30k Xp you will never get regardless of what you sink. (gold account No Event)
What I do see is BB's not helping there friendly subs by shooting those pesky ASW ships due low XP gain.