If they really do have special broadsides, then I can see the Cerberus becoming one of the most popular ships in SVS for obvious reasons: An explosive broadside, the speed of a war sloop, and only one less deck cannon on each side. The main drawback is the low health.

By "add all the ships," do you mean add every single ship (hopefully excluding the Fleet ships)? If so, then I kind of agree with you - sailing an EITC Juggernaut or Navy Dreadnought would be fun.
....As well as an EITC Corsair.....

Also, as of the Raven's Cove update, the Ship Of The Line has regular sails.

There'd be no real point in adding all ships. I think we're fine with the ones they added. Also, the Ship of the Line had a large amount of problems when it was released:
1. Navy coloring
2. Back wall you could fall through
3. No repair spots
4. 4 cannons that had a blocked view
5. Messed up boarding and bottle icons

After the update, it had:
1. Back wall you could fall through
2. No repair spots
3. Messed up boarding and bottle icons
4. Missing aft mast.
5. 4 holes in the wall from when there were cannons there.
After the most recent update, it has:
1. Back wall you could fall through
2. No repair spots
3. Messed up boarding and bottle icons
4. 4 holes in teh wall from when there were cannons there.

I think you're on to something there matey ;)

You think my case for the new ships having ammo broadsides makes sense?

Well, I am pretty sure the allure of the new ships will be the type of broadside ammos they fire.

I've already figured out which ones I'm getting: Revenant will replace my war frigate. Ship of the line will replace my other war frigate. Cerberus will replace my War sloop. You?

I am not sure if the exact enemy ships that were released on Test will actually make it into the Live game - I hope they will! If they do, I'll pick up a Warlord, then wait to see reports of which other newly released ships play well in SvS.

I'd imagine the Cerberus would be extremely popular in SVS, especially if they raise its health. It has 3 deck cannons on each side, which is almost as much as a regular war sloop. It is also slightly smaller than a regular war sloop. It would also fire a broadside of 7 explosives. No player ship could have a large amount of health left after being hit with 7 player explosives. NPC explosives only do like 1,500-2,000 damage each. But if a person put 5 points in explosive, it would do an average of around 7,000-8,000 damage. However, shots are a lot weaker in SVS, even when firing into dead hull panels, so let's assume explosive power would be reduced to about 4,000. Add in Open Fire! and that's 6,000 damage. Now assume only 3 out of 7 hit. That is still about 18,000 damage to the enemy ship. Now, it would probably take one shot, possibly two, to destroy the hull panels. Either way, that's pretty much a guarantee of about 6,000 damage to the hull health. If all 7 hit, and the hull panels were already dead, that's 42,000 damage.

While this may be true, I'd be willing to bet that those explosives would come right out of your cannon stash, allowing you only 12 shots.

I seriously doubt that if these ships do come out with specialized broadsides, it'd be an endless amount; that would make sailing/SVS far too easy. The concept still excites me though.

or they could raise ur 12 shots or they could make each broadside count won shot

Maybe you'd have to buy broadsides separately from cannon ammo? Like, buy this many fury broadsides. That many explosive broadsides, etc.

I seriously get the feeling that these aren't the final names for the ships... but I could be wrong...

SOTL will replace my War Galleon, Cerberus will replace my War Sloop, and Warlord will replace my War Frigate.

Just my thoughts - don't take this personal.
Ship Of The Line replaces War Frigate.
Cerberus replaces War Galleon.
Nothing replaces War Sloop.

I think that from a logical standpoint, it would make more sense for the Ship of the Line to replace you War Galleon and Cerberus your War Frigate. The reason being that Ship of the Line is effectively a superior version of the War Galleon. Anybody care to guess when these new ships will actually come out? I also wonder what the lore behind it will be.