Okay, this is a little off the water here kind of topic, but it is worth a shot.

For a ship such as DD (that really has no change to survive), give them the option to
load a raft on their ship that they can use in GB2, and GB2 only. But this raft is
anything but a few ordinary sailors, they are actually on a sabotage mission. I
believe this raft would give DD a change to make it in GB2 and actually be useful -
aside from loading 2x HH on their ship and just fire at SS for 0 damage :/.

The raft itself would work like a torpedo, but would be able to be maneuvered by the
player itself (much like a plane from a CV). It would, however, need to be invincible
inorder for the raft to actually be effective. But, it would have a limited ammount of
fuel to reach its target; and should it fail, then it sinks to the ocean floor and never
be heard of again.

The idea can be branched off. You could do multiple things: sabotage front
weaponry, rear weaponry, engines (long shot there, but possibly for a few seconds),
or just sabotage the hull for reasonable damage.

I am not good at statistics however, so somebody other than me should make those,
otherwise I would end up being like: "Damage: 99,999/Knt: 510/Fuel: 99,999"
(completely imbalanced, so you get my point.)
Please feel free to shoot this topic down if it is to much of a long-shot or wont work.
Also feel free to add or improve upon this topic if you feel it would work.